Characterization of Boar Rental Schemes for Reproduction Purposes in a Swine Center in the Chinampa Region of Xochimilco, Mexico

S?nchez-Aparicio P, M. Gonz?lez-Lozano, D. Mota-Rojas, M. Alonso-Spilsbury, M.E. Trujillo-Ortega, R. Ram?rez-Necoechea and 2R.E. P?rez-Galv?n

Journal of Animal and Veterinary Advances 5 ( 1 ): 63 - 69 , 2006