Title from title screen (viewed on July 31, 2008). "Veterinary Services." "November 2002."
Mode of access: Internet at the U.S. Dept. of Agriculture, Animal and Plant Health Inspection Service web site. Address as of 7/31/08: http://www.aphis.usda.gov/publications/animal%5Fhealth/content/printable%5Fversion/fs%5Fahdairy.pdf; current access available via PURL.