Instituto Interamericano de Cooperación para la AgriculturaRuiz, M.E.2007-11-131995-04-012007-11-13199492-9039-260-6http://hdl.handle.net/10625/13667Text289 p. : ill.enANIMAL PRODUCTIONAGRICULTURAL RESEARCHAGRICULTURAL DEVELOPMENTFARMING SYSTEMSMODELSLIVESTOCKFARMERSNEW TECHNOLOGYON-FARM RESEARCHAnimal production systems research : methodological and analytical guidelinesBook