Taktaz Hafshejani,, T., Khadivi Boroujeni,, S., Babakhanian Boroujeni,, فرشاد (2013) ‘Comparison of three types of GNRH administration in
heat synch program on pregnancy rate and LH surge
in dairy cows’, journal of veterinary clinical research, 4(4), pp. 269-279. doi: