Morshedi,A , , Rabbani,M , , Zahrai salehi,T , , Rezazadeh,F , and Bazargani,T . "Evaluation of antibodies levels against Escherichia coli, rotavirus and coronavirus in the colostrum of non-vaccinated cows in southern Tehran, Iran" .e22094 , Iranian Journal of Veterinary Medicine, 4, 4, 2010, e22094. doi: 10.22059/ijvm.2010.22094