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The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Print Collection, The New York Public Library. "Mary Cassatt's Letter to Frank Weitenkampf" The New York Public Library Digital Collections. 1906. https://digitalcollections.nypl.org/items/91765d20-5447-0130-18ba-58d385a7bbd0
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Print Collection, The New York Public Library. "Mary Cassatt's Letter to Frank Weitenkampf" New York Public Library Digital Collections. Accessed January 15, 2025. https://digitalcollections.nypl.org/items/91765d20-5447-0130-18ba-58d385a7bbd0
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Print Collection, The New York Public Library. (1906). Mary Cassatt's Letter to Frank Weitenkampf Retrieved from https://digitalcollections.nypl.org/items/91765d20-5447-0130-18ba-58d385a7bbd0
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