Metropolitan Museum of Art (New York, N.Y.), Hartley, Marsden; Marin, John, undated

Metropolitan Museum of Art (New York, N.Y.), Hartley, Marsden; Marin, John, undated, Box: 18, Folder: 6. Georgia O'Keeffe Papers, MS-33. Georgia O'Keeffe Museum. https://archive.okeeffemuseum.org/repositories/2/archival_objects/4139 Accessed June 15, 2026.