@book{71,
	author = {Lipschutz, Martin M. and Lipschutz, Seymour.},
	title = {Schaum's outline of theory and problems of data processing /},
	publisher = {McGraw-Hill,},
	year = {c1981.},
	series = {Schaum's outline series},
	address = {New York :},
	note = {Includes index.}
}