@book{94768,
	author = {Crenshaw, Bolling H. and Simpson, Thomas Marshall},
	title = {Commercial algebra},
	publisher = {Prentice-Hall},
	year = {1950.},
	address = {New York},
	edition = {3d ed. rev. and enl.},
	note = {Crenshaw's name appeared first in the 1935 edition.}
}