@book{6846,
	author = {Nielsen, Kaj Leo, and Vanlonkhuyzen, John H.,},
	title = {Plane & spherical trigonometry / },
	publisher = {Barnes & Noble, },
	year = {c1954.},
	address = {New York : },
	edition = {Rev.},
	note = {Previous editions published under title: An outline of plane and spherical trigonometry.}
}