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 January 13, 1984, the Food and Drug Administration's Bureau of Veterinary Medicine (BVM) accepted recommendations from the American Veterinary Medical Association (AVMA) that allow veterinarians to use FDA-approved drugs for extra-label purposes under specific conditions.
Iowa State University Veterinarian
"FDA Accepts AVMA Recommendations on Extra-Label Drug Use,"
Iowa State University Veterinarian: Vol. 46
, Article 15.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol46/iss1/15