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Schomburg Center for Research in Black Culture, Jean Blackwell Hutson Research and Reference Division, The New York Public Library. "Gum copal for sale, Upper Congo." The New York Public Library Digital Collections. 1912. https://digitalcollections.nypl.org/items/510d47dd-e3a1-a3d9-e040-e00a18064a99
Schomburg Center for Research in Black Culture, Jean Blackwell Hutson Research and Reference Division, The New York Public Library. "Gum copal for sale, Upper Congo." New York Public Library Digital Collections. Accessed September 13, 2024. https://digitalcollections.nypl.org/items/510d47dd-e3a1-a3d9-e040-e00a18064a99
Schomburg Center for Research in Black Culture, Jean Blackwell Hutson Research and Reference Division, The New York Public Library. (1912). Gum copal for sale, Upper Congo. Retrieved from https://digitalcollections.nypl.org/items/510d47dd-e3a1-a3d9-e040-e00a18064a99
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Gum copal for sale, Upper Congo., (1912)
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