na INLIS000000000002970 20210519133505 210519||||||||| | ||| |||| || | 010-0521002970 en 636.2.034/ECK/d 636.2.034/ECK/d Eckles, Clarence H. Dairy farming: a self teaching course based dairy cattle and milk production Washington The Macmillan Company 1939 ill., 329 p.; 21 cm DAIRY CATTLE -- MILK PRODUCTION