National Gallery of Art and Philadelphia Museum of Art, general information, undated

National Gallery of Art and Philadelphia Museum of Art, general information, undated, Box: 17, Folder: 13. Georgia O'Keeffe Papers, MS-33. Georgia O'Keeffe Museum. https://archive.okeeffemuseum.org/repositories/2/archival_objects/4131 Accessed June 12, 2026.