@book{18246,
	author = {Twiss, Ruth M.,},
	title = {Mathematics for business occupations},
	publisher = {Gregg division, McGraw-Hill},
	year = {[1968]},
	address = {New York,},
	edition = {2d ed.},
	note = {First ed. published in 1956 under title: Arithmetic for business and everyday use; 2d ed. published in 1962 under title: Arithmetic for business and consumer use; 4th ed. published in 1975 under title: Math for business careers.}
}