The longevity of this book was noted by the American Psychological Association in 1994.Street, W. R. (1994), "Addenda", A Chronology of Noteworthy Events in American Psychology, Washington, D.C.: American Psychological Association "29 Nov 1938 Ralph Buchsbaum's book Animals Without Backbones was first published. This enduring guide to invertebrate behavior has gone through several editions over a lifetime of more than 50 years." (ISBN978-0-226-07874-8).
"Class News: Deaths: Faculty". The University of Chicago Magazine. The University of Chicago. June 1996. Retrieved 2013-12-09.. Mildred Shaffer Buchsbaum.
