@book{68859,
	author = {Aguilar Angeles, Jose Alfredo.},
	title = {Saneamiento y recuperación de una plantación de pino en Acaxochitlán, Hidalgo},
	publisher = {El autor,},
	year = {1989},
	address = {Chapingo, Méx. :},
	note = {32-7}
}