Petersen, William Earl,
Dairy science : its principles and practice / by W. E. Petersen ; Edited by R. W. Gregory. - 2d ed. - Philadelphia : Lippincott, 1950. - viii, 679 p. : ill. ; 24 cm. - Lippincott's Agricultural Science Series .
Includes bibliographical references and index.
agr50000416
GB50-2689
Dairying.
Dairy cattle.
SF239 / .P43 1950
637 / PED
Dairy science : its principles and practice / by W. E. Petersen ; Edited by R. W. Gregory. - 2d ed. - Philadelphia : Lippincott, 1950. - viii, 679 p. : ill. ; 24 cm. - Lippincott's Agricultural Science Series .
Includes bibliographical references and index.
agr50000416
GB50-2689
Dairying.
Dairy cattle.
SF239 / .P43 1950
637 / PED