Miscellaneous correspondence: personal and concerning Joseph Rock, Nicotiana work, and vacations, etc., 1938–1956, https://huntbot.org/hibdarc/collections/182/182_Goodspeed_Bx3FF71_r.pdf. Hunt Institute for Botanical Documentation Archives. https://as.huntbot.org/repositories/2/digital_objects/4231 Accessed June 19, 2026.