@book{87504,
	author = {Alvear Herrera, Ernesto.},
	title = {Diagnóstico y suplementación mineral en ganado bovino de Zirándaro, Guerrero},
	publisher = {El autor,},
	year = {2003.},
	address = {Chapingo, Méx. :},
	url = {http://10.13.5.2/tesis/99021.pdf}
}