The history of commercial production of laboratory rodents.
D000818:Animals; D005260:Female; D005856:Germ-Free Life; D049673:History, 20th Century; D006799:Housing, Animal; D008297:Male; D051381:Rats / Q000254:growth & development; D012106:Research / Q000266:history; D012377:Rodentia / Q000254:growth & development*; D014186:Transportation; D014481:United States