Journal of Animal and Veterinary Advances
Year: 2009 | Volume: 8 | Issue: 4 | Page No.: 747-754
Factors Affecting Days Open in Holstein Dairy Cattle in Khorasan Razavi Province, Iran; A Cox Proportional Hazard Model
A.R. Bahonar , M. Azizzadeh , M.A. Stevenson , M. Vojgani and M. Mahmoudi
 
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