- Missouri Livestock Brands
Missouri Dept. of Agriculture - Animal Disease TraceabilityMissouri Dept. of Agriculture
- Animal Disease TraceabilityAnimal and Plant Health Inspection Service
U.S. DEPARTMENT OF AGRICULTURE - Cattle IdentificationAnimal and Plant Health Inspection Service
U.S. DEPARTMENT OF AGRICULTURE - Cattle Identification Database (CID)Holstein Association USA
- Methods of Livestock IdentificationPurdue University, Dept. of Animal Sciences, Michael Neary, Extension Animal Scientist,
Ann Yager, Animal Sciences Student - National Animal Identification System(Failed System) Wikipedia article
- National Animal Identification System (NAIS) : a User Guide(Failed System) USDA, draft version, 11/2006, Archived
- Some Ways To Indentify Beef CattleThe Cattle Site, By Oklahoma Cooperative Extension Service, Division of Agricultural Sciences and Natural Resources, 5/24/2007
- USDA Looks At Another National Animal ID SystemBeef Magazine, Wes Ishmael,10/6/2010