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
A grade Ayrshire cow gave birth to five calves on the Fred Haeger farm at Maynard, Iowa, on August 30, 1942, Of the three males and two females, which were born without difficulty, one is living at the present time.
Schneider, R. H.
"Quintuplets in a Cow,"
Iowa State University Veterinarian: Vol. 5
, Article 13.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol5/iss2/13