Optical dark room, old outfit, August 30, 1930

Optical dark room, old outfit, August 30, 1930, Box: 30, Folder: D:1456. Bourquin family collection, RH MS G61. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/476347 Accessed December 27, 2025.