Pig production : proceedings / edited by D.J.A. Cole. - University Park : Pennsylvania State University Press, [1972] Includes bibliographies. ISBN: 0271011157 LCCN: 70038754 //r852 Subjects--Topical Terms: Swine.Swine -- Breeding.--Swine -- Breeding. LC Class. No.: SF395 / .E26 1971 Dewey Class. No.: 636.4/08