INFLUENCE OF MELATONIN TREATMENT ON PUBERTY ONSET INBUFFALO HEIFERS FROM BULGARIAN MURRAH BREED Journal title: TRADITION AND MODERNITY IN VETERINARY MEDICINE Authors: Vladimir Planski, Stanimir Yotov, Parvan Parvanov, Manol Karadaev, Yordanka Ilieva, Kalin Hristov, D... Subject(s):