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© The New York Public Library, 2024
The New York Public Library is a 501(c)(3) | EIN 13-1887440
Samuel Langhorne Clemens collection of papers, 1856-1938 (bulk 1870-1938)
Henry W. and Albert A. Berg Collection of English and American Literature, The New York Public Library. "Harper, J. H. Mark Twain's seventieth birthday party. Typescript, unsigned, undated." The New York Public Library Digital Collections. 1934. https://qa-digitalcollections.nypl.org/items/e2fbeb60-c24f-0131-238c-58d385a7b928
Henry W. and Albert A. Berg Collection of English and American Literature, The New York Public Library. "Harper, J. H. Mark Twain's seventieth birthday party. Typescript, unsigned, undated." New York Public Library Digital Collections. Accessed November 27, 2024. https://qa-digitalcollections.nypl.org/items/e2fbeb60-c24f-0131-238c-58d385a7b928
Henry W. and Albert A. Berg Collection of English and American Literature, The New York Public Library. (1934). Harper, J. H. Mark Twain's seventieth birthday party. Typescript, unsigned, undated. Retrieved from https://qa-digitalcollections.nypl.org/items/e2fbeb60-c24f-0131-238c-58d385a7b928
<ref name=NYPL>{{cite web | url=https://qa-digitalcollections.nypl.org/items/e2fbeb60-c24f-0131-238c-58d385a7b928 | title=
(text)
Harper, J. H. Mark Twain's seventieth birthday party. Typescript, unsigned, undated., (1934)|author=Digital Collections, The New York Public Library |accessdate=November 27, 2024 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>