@book{40779,
	author = {Keedy, Mervin Laverne, and Bittinger, Marvin L.},
	title = {Essential mathematics},
	publisher = {Addison-Wesley Pub. Co.},
	year = {c1984.},
	address = {Reading, Mass.},
	edition = {4th ed.},
	note = {Includes index.}
}