"The series of blacks, grays, and whites." Psycholog. R. 1925, 32, 334-336., 1925,

"The series of blacks, grays, and whites." Psycholog. R. 1925, 32, 334-336., 1925,, Box: 1, Folder: 1. Forrest Lee Dimmick papers, 2862. Division of Rare and Manuscript Collections. https://archives.library.cornell.edu/repositories/2/archival_objects/379534 Accessed January 17, 2026.