@book{11952,
	author = {Heller, Robert Chester, and Doverspike, G. E.},
	title = {Identification of tree species on large-scale panchromatic and color aerial photographs /},
	publisher = {U.S. Dept. of Agriculture, Forest Service,},
	year = {1964.},
	series = {Agriculture handbook / United States Department of Agriculture ;},
	address = {Washington, D.C. :}
}