@book{98260,
	author = {Ayala Ortega, Salvador Alejandro},
	title = {Diagnóstico sobre plaguicidas en los viveros forestales de México},
	publisher = {El autor,},
	year = {2009},
	address = {Chapingo, Méx. :},
	url = {http://10.13.5.2/tesis/109917.pdf}
}