@book{555,
	author = {Silva Flores, Ramón.},
	title = {Análisis multivariado de caracteres morfológicos de Pinus oocarpa var. Ochoterenae Mart y Pinus tecunumanii (Schwer) Eg. y Perry},
	publisher = {El autor,},
	year = {1990},
	address = {Chapingo, Méx. :}
}