Effect of calving difficulty on milk production, fertility and estimation of economic value for direct and maternal calving difficulties Iranian

H. Ghiasi, A.Nejati-Javaremi , A. Pakdel & H.Mehrabani-Yeganeh, 2011, Effect of Calving Difficulty on Milk Production, Fertility and Estimation of Economic value for Direct and Maternal Calving Difficulties, Iranian Journal of Animal Science , 42, 1, 57-64