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Alma Mahler letters to Willy Haas, 1912-1961 (inclusive) 1947-1961 (bulk)
Held at: University of Pennsylvania: Kislak Center for Special Collections, Rare Books and Manuscripts [Contact Us]
Held at: University of Pennsylvania: Kislak Center for Special Collections, Rare Books and Manuscripts [Contact Us]
Held at: Princeton University Library: Public Policy Papers [Contact Us]
Held at: Princeton University Library: Manuscripts Division [Contact Us]
Held at: University of Pennsylvania: Kislak Center for Special Collections, Rare Books and Manuscripts [Contact Us]
Held at: German Society of Pennsylvania: Joseph P. Horner Memorial Library [Contact Us]
Held at: Princeton University Library: Manuscripts Division [Contact Us]
Held at: Philadelphia Museum of Art Archives [Contact Us]
Held at: German Society of Pennsylvania: Joseph P. Horner Memorial Library [Contact Us]
Held at: German Society of Pennsylvania: Joseph P. Horner Memorial Library [Contact Us]
Held at: Philadelphia Museum of Art Archives [Contact Us]