Dairy science its principles and practice Petersen, William Earl creator Gregory, R. W. ed. text xx Philadelphia Lippincott 1950 2d ed. monographic eng
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viii, 679 p. : ill. ; 24 cm. by W. E. Petersen ; Edited by R. W. Gregory. Includes bibliographical references and index. Dairying Dairy cattle SF239 .P43 1950 637 PED Lippincott's Agricultural Science Series agr50000416 DLC 750829 20150107101846.0 8829870