@book{164184,
	author = {Krebs, Charles J.},
	title = {Ecología: estudio de la distribución y la abundancia  /},
	publisher = {Harla,},
	year = {    },
	address = {México  :},
	note = {Trad. de: Ecology: the experimental analisis of distribution and abundance, 2 ed. de 1978}
}