@book{163424,
	author = {Guerra Dueñas, Jaime Guadalupe},
	title = {Sustitución de antibióticos por levadura (Saccharomyces cerevisiae) en dietas pre-inicial e inicial en cerdos  /},
	publisher = {El autor,},
	year = {1988},
	address = {Chapingo, Méx .  :}
}