@book{142363,
	author = {Mason, Robert Deward, },
	title = {Programmed learning aid for business and consumer mathematics},
	publisher = {Learning Systems Co.},
	year = {1978.},
	series = {Irwin PLAID series},
	address = {Homewood, Ill.},
	note = {Cover title: Self review in business and consumer mathematics.}
}