SYNCHRONIZATION AND INDUCTION OF ESTRUS IN HEIFERS WITH A PROGESTAGEN AND ESTROGEN J. N. WILTBANK and E. GONZALEZ-PADILLAAnn. Biol. anim. Bioch. Biophys., 15 2 (1975) 255-262DOI: https://doi.org/10.1051/rnd:19750212