Bancroft, Helen H. letter to Eames, Arthur J (1881–1969), 28 October 1931, Box: 1, Folder: 13. William Winfield Ray collection of 20th century botanists correspondence and other materials, HIBDARC-0048. Hunt Institute for Botanical Documentation Archives. https://as.huntbot.org/repositories/2/archival_objects/3644 Accessed March 20, 2026.