Comments on preceding nitrogen report prepared by Dr. R. F. Bryan - J. H. Whitney & Company, January 15, 1949, Box: 38, Folder: 13. Papers of Kenneth Aldred Spencer, RH MS VLT 157. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/328411 Accessed January 13, 2025.