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Morris Arboretum of the University of Pennsylvania plans, drawings, and maps collection, 1909-2013 (inclusive)
Held at: Morris Arboretum Archives [Contact Us]
Held at: Morris Arboretum Archives [Contact Us]
Held at: Montgomery Township Historical Society [Contact Us]
Held at: Plymouth Meeting Historical Society [Contact Us]
Held at: Springfield Township Historical Society (Montgomery County, Pa.) [Contact Us]
Held at: Old York Road Historical Society [Contact Us]
Held at: The Historical Society of Trappe, Collegeville, Perkiomen Valley [Contact Us]