TY - BOOK AU - Johnson,Martin H. TI - Essential reproduction SN - 0632042877 (hb) U1 - 573.619 PY - 1980/// CY - London PB - Blackwell Scientific Publications KW - Veterinary science KW - Essential reproduction KW - Sex steroids KW - Sexual behavior KW - Pregnancy maintenance KW - Testicular function KW - Sex KW - RCSVETS N1 - Includes bibliographical references and index ER -