@book{209548,
	author = {Daniel, Theodoro W. and Helms, John a.},
	title = {Principios de silvicultura / T. W. Daniel; J. A. Helms; F. S. Backer... [et al.]},
	publisher = {Mcgraw-Hill},
	year = {1982},
	address = {México},
	note = {Revisión técnica de Antonio Sierra Pineda y Otón Yáñez Márquez}
}