OVULATION CONTROL IN CATTLE WITH PROGESTERONE INTRAVAGINAL DEVICE (PRID) AND GONADOTROPIN RELEASING HORMONE (GnRH) R. E. MAUER, S. K. WEBEL and M. D. BROWN Ann. Biol. anim. Bioch. Biophys., 15 2 (1975) 291-296 DOI: 10.1051/rnd:19750216