@book{21868,
	author = {Louisiana. and Lavergne, D. C.},
	title = {Operation, adjustment, and care of tractors.},
	year = {1942.},
	series = {Its Bulletin},
	address = {Baton Rouge, La.,},
	note = {At head of title: State Dept. of education of Louisiana. January, 1942.}
}