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Herbert T. Pratt Papers, 1793-2013 (inclusive) 1945-2000 (bulk)
Held at: Science History Institute Archives [Contact Us]
Held at: Science History Institute Archives [Contact Us]
Held at: Margaret R. Grundy Memorial Library [Contact Us]
Held at: Newtown Historic Association [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Southampton Baptist Corporation [Contact Us]
Held at: Upper Darby Historical Society [Contact Us]
Held at: Westtown School Archives [Contact Us]
Held at: Newtown Historic Association [Contact Us]
Held at: Newtown Square Historical Society [Contact Us]
Held at: Historical Society of Bensalem Township [Contact Us]
Held at: New Hope Historical Society [Contact Us]
Held at: Historic Carversville Society [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Tinicum Township Historical Society [Contact Us]
Held at: Yardley Historical Association [Contact Us]
Held at: Princeton University Library: Rare Book Collection [Contact Us]
Held at: Lansdale Historical Society [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Plymouth Meeting Historical Society [Contact Us]
Held at: Springfield Township Historical Society (Montgomery County, Pa.) [Contact Us]
Held at: John Bowman Bartram Special Collections Library [Contact Us]
Held at: Darby Free Library [Contact Us]
Held at: King of Prussia Historical Society [Contact Us]
Held at: Limerick Township Historical Society [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Pottstown Historical Society [Contact Us]
Held at: Historic Langhorne Association [Contact Us]
Held at: Historical Society of Hilltown Township [Contact Us]
Held at: Haverford College Quaker & Special Collections [Contact Us]
Held at: St. James' Community History Center [Contact Us]
Held at: Historical Society of the Eastern Pennsylvania Conference of the United Methodist Church [Contact Us]
Held at: Friends Historical Library of Swarthmore College [Contact Us]
Held at: Princeton University Library: Manuscripts Division [Contact Us]
Held at: Friends Historical Library of Swarthmore College [Contact Us]
Held at: Chestnut Hill Historical Society [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: University of Pennsylvania: University Archives and Records Center [Contact Us]
Held at: Haverford College Quaker & Special Collections [Contact Us]
Held at: Chestnut Hill Historical Society [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Wissahickon Valley Historical Society [Contact Us]
Held at: Mikveh Israel Archives [Contact Us]
Held at: Awbury Arboretum [Contact Us]
Held at: Friends Historical Library of Swarthmore College [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Fairmount Park Historic Resource Archives [Contact Us]
Held at: University of Pennsylvania: University Archives and Records Center [Contact Us]
Held at: Princeton University Library: University Archives [Contact Us]
Held at: Princeton University Library: Rare Book Collection [Contact Us]
Held at: Fairmount Park Historic Resource Archives [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Radnor Historical Society [Contact Us]
Held at: Tredyffrin Easttown Historical Society [Contact Us]
Held at: Historical Society of Frankford [Contact Us]
Held at: Friends of Northeast Philadelphia History [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Union Library of Hatboro [Contact Us]
Held at: Princeton University Library: University Archives [Contact Us]
Held at: Historical Society of Frankford [Contact Us]
Held at: Historical Society of Pennsylvania [Contact Us]
Held at: Princeton University Library: University Archives [Contact Us]
Held at: Historical Society of Pennsylvania [Contact Us]
Held at: Westtown School Archives [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Princeton University Library: Manuscripts Division [Contact Us]
Held at: Historical Society of Pennsylvania [Contact Us]
Held at: Library Company of Philadelphia [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Pennsylvania Horticultural Society [Contact Us]
Held at: Friends Historical Library of Swarthmore College [Contact Us]
Held at: The Historical and Interpretive Collections of The Franklin Institute [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: University of Pennsylvania: Kislak Center for Special Collections, Rare Books and Manuscripts [Contact Us]
Held at: University of Pennsylvania: University Archives and Records Center [Contact Us]
Held at: University of Pennsylvania: University Archives and Records Center [Contact Us]
Held at: University of Pennsylvania: University Archives and Records Center [Contact Us]
Held at: Cliveden of the National Trust [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Historical Society of Pennsylvania [Contact Us]
Held at: Haverford College Quaker & Special Collections [Contact Us]
Held at: Historical Society of Pennsylvania [Contact Us]
Held at: Concord Township Historical Society [Contact Us]
Held at: Princeton University Library: Manuscripts Division [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: University of Pennsylvania: University Archives and Records Center [Contact Us]
Held at: Friends Historical Library of Swarthmore College [Contact Us]
Held at: Quaker Meeting Records at Haverford College Quaker & Special Collections and Friends Historical Library of Swarthmore College [Contact Us]
Held at: Princeton University Library: Public Policy Papers [Contact Us]