@book{206997,
	author = {Houghton, C.O. and Delaware. Agr. Exp. Sta. Bull.; 74},
	title = {Some experiences with insecticides for the San Jose Scale  /},
	publisher = { Agricultural Experiment Station},
	address = {Newark, Del. :},
	note = {Encuadernado con otros impresos similares}
}