@book{12223,
	author = {Smith, Robert V., and United States.},
	title = {Soil survey, Montgomery County, Pennsylvania.},
	publisher = {U.S. Dept. of Agriculture, Soil Conservation Service; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.]},
	year = {1967.},
	address = {Washington]},
	note = {Cover title.}
}