Dr. Sauer's Research on John Gould's correspondence including individual years of Gould's letters, photocopies with notes and transcriptions by Dr. Sauer, 1804 - 1859. Sauer's Gouldiana Research about John Gould and other papers, MS 304. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/204067 Accessed November 28, 2024.