@book{206905,
	author = {Gillette, C. P. and Langford, G. S. and Colorado Office State Entomologist Circular;, 46},
	title = {Control of some scale insects infesting colorado trees and shrubs  /},
	publisher = { Office of State Entomologist,},
	address = {Fort Collins, Col.  :},
	note = {Encuadernado con otros impresos similares}
}