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
On April 28, 1953, a two-year-old ewe was presented at the clinic with a history of being bloated. The ewe was due to lamb in approximately one week.
"Hydrops Amnii in a Ewe,"
Iowa State University Veterinarian: Vol. 16
, Article 11.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol16/iss2/11