@book{2153,
	author = {Stebbins, G. Ledyard  and Valencia, José, },
	title = {Procesos de la evolución orgánica /},
	publisher = {Prentice Hall International, },
	year = {1978},
	address = {Madrid, Esp. :},
	note = {Título original: Processes of organic evolution},
	url = {https://www.cicy.mx/sitios/sib/doctoelectronico/2179.pdf}
}