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Bausch & Lomb Refractometer Material, undated
Held at: Science History Institute Archives [Contact Us]
Held at: Science History Institute Archives [Contact Us]
Held at: Science History Institute Archives [Contact Us]
Held at: Science History Institute Archives [Contact Us]
Held at: Science History Institute Archives [Contact Us]
Held at: Science History Institute Archives [Contact Us]
Held at: Science History Institute Archives [Contact Us]
Held at: Philadelphia Museum of Art Archives [Contact Us]
Held at: University of Pennsylvania: Archives at the Library of the Katz Center for Advanced Judaic Studies [Contact Us]
Held at: Haverford College Quaker & Special Collections [Contact Us]
Held at: Haverford College Quaker & Special Collections [Contact Us]