http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Dairy herd management practices focusing on preweaned heifers, April 1991 - July 1992
National Dairy Heifer Evaluation Project
Animal and Plant Health Inspection Service.
National Animal Health Monitoring System (U.S.)
United States Department of Agriculture, Animal Plant Health Inspection Service, Veterinary Services.
Animal Nutritional Physiological Phenomena