%0 Conference Proceedings %T The survey of maternal and fetal effects on calving time of single pregnancy in Holstein dairy cattle %A Talebkhan Garoussi, Massoud %A Fallah Rad, Amir Hooshang %A امير هوشنگ فلاح راد %A زهرا ميش مست %J International Confrence on Free Radicals & natural Products in Health %D 2008