REPRODUCTIVE STUDIES OF BRAHMAN CATTLE .3. COMPARISON OF WEIGHT, PROGESTERONE CONTENT, HISTOLOGICAL CHARACTERISTICS, AND 3BETA-HYDROXYSTEROID DEHYDROGENASE-ACTIVITY IN CORPORA-LUTEA OF BRAHMAN, HEREFORD, AND BRAHMAN X HEREFORD HEIFERS
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10.1016/0093-691X(78)90131-0