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Schomburg Center for Research in Black Culture, Photographs and Prints Division, The New York Public Library. "Mary Silvinia Burghhardt Du Bois, with her sister and infant son William" The New York Public Library Digital Collections. 1868. https://digitalcollections.nypl.org/items/8e0981a2-4ae9-a10a-e040-e00a18063089
Schomburg Center for Research in Black Culture, Photographs and Prints Division, The New York Public Library. "Mary Silvinia Burghhardt Du Bois, with her sister and infant son William" New York Public Library Digital Collections. Accessed November 1, 2024. https://digitalcollections.nypl.org/items/8e0981a2-4ae9-a10a-e040-e00a18063089
Schomburg Center for Research in Black Culture, Photographs and Prints Division, The New York Public Library. (1868). Mary Silvinia Burghhardt Du Bois, with her sister and infant son William Retrieved from https://digitalcollections.nypl.org/items/8e0981a2-4ae9-a10a-e040-e00a18063089
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Mary Silvinia Burghhardt Du Bois, with her sister and infant son William, (1868)|author=Digital Collections, The New York Public Library |accessdate=November 1, 2024 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>