| Francis Benjamin Johnston Students constructing telephones at Hampton Institute [Hampton Normal and Agricultural Institute, Hampton, Virginia] 1899 or 1900 Photographic print Library of Congress, Prints and Photographs Division Call Number: LOT 11051-3 , Reproduction Number: LC-DIG-ppmsca-19157 (digital file from original item) LC-USZ62-132386 (b&w film copy neg.) LL/82325
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