title: William Earl Petersen, 1892-1971: a brief biography.
authors.affiliation: Animal Science and Physiology, NCSU, Raleigh, NC 27695, USA.
authors.forename: E V
authors.initials: EV
authors.lastname: Caruolo
mesh_terms: D000822:Animal Husbandry / Q000266:history; D003612:Dairying / Q000266:history; D049673:History, 20th Century; D014481:United States