@book{206946,
	author = {Delong, Dwight M. and Washington United States Depto. Agr. Technical Bull; 231},
	title = {A revision of the american species of empoascaknown to occur north of México  /},
	publisher = { Department of Agriculture},
	address = {Washington :},
	note = {Encuadernado con otros impresos similares}
}