Quiring's notes on the creation and building of the Charge-Thought Separator; written on envelopes addressed to Quiring, October 17, 1919 - November 15, 1919, Folder: 1. William A. Quiring notes, RH MS P916. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/194538 Accessed May 27, 2024.