@book{12191,
	author = {Williams, Jack C., and Welker, Anthony Joseph, and United States.},
	title = {Soil survey, Gray County, Texas},
	publisher = {U.S. Dept. of Agriculture, Soil Conservation Service; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.]},
	year = {1966.},
	address = {Washington]},
	note = {Cover title.}
}