Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
Reproduction in Farm Animals, edited by E.S.E. Hafez, 401 pages plus index, glossary and list of films. Many excellent diagrams. Lea and Febiger, Philadelphia, 1968.
Adams, W. M.
"Book Review: "Reproduction in Farm Animals","
Iowa State University Veterinarian: Vol. 30
, Article 7.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol30/iss3/7