@book{21975,
	author = {Robson, John B.},
	title = {Course of study in arithmetic for grades four, five, six, and seven.},
	year = {[1943]},
	series = {Louisiana. Dept. of education. Bulletin},
	address = {Baton Rouge,},
	note = {At head of title: State Dept. of education of Louisiana. 1943 ...}
}