@book{4270,
	author = {United States},
	title = {Dictionary of occupational titles},
	publisher = {The Administration : for sale by the Supt. of Docs., U.S. Govt. Print. Off.},
	year = {1991.},
	address = {[Washington]},
	edition = {4th ed. Rev. 1991},
	note = {Includes indexes.}
}