@book{12167,
	author = {United States.},
	title = {Aerial-photo interpretation in classifying and mapping soils.},
	publisher = {For sale by the Supt. of Docs., U.S. Govt. Print. Off.,},
	year = {1966.},
	series = {United States. Dept. of Agriculture. Agriculture handbook ;},
	address = {Washington,}
}