@book{207145,
	author = {Clarke, Warren T. and California Agric. Exp. Sta. Bull.; 160},
	title = {The hop aphis (phorodon humili, Scharank)  /},
	publisher = { University of California Agricultural Experiment Stationq},
	address = {Sacramento :},
	note = {Encuadernado con otros impresos similares}
}