@book{90271,
	author = {Castillo Zeno, Joaquina},
	title = {Preparación del sitio de plantación para Pinus hartwegii Lindl /},
	publisher = {El autor,},
	year = {2005.},
	address = {Chapingo, Méx. :},
	url = {http://10.13.5.2/tesis/101801.pdf}
}