@book{98452,
	author = {Hernández Pérez, Fabián. and Torres Lamas, Secundino},
	title = {Niveles críticos nutrimentales preliminares para especies forestales de México a nivel de vivero},
	publisher = {El autor,},
	year = {2009},
	address = {Chapingo, Méx. :},
	url = {http://10.13.5.2/tesis/110110.pdf}
}