@book{4883,
	author = {Billstein, Rick. and Libeskind, Shlomo.},
	title = {A problem solving approach to mathematics for elementary school teachers /},
	publisher = {Benjamin/Cummings,},
	year = {c1990.},
	address = {Redwood City, Calif. :},
	edition = {4th ed.},
	note = {Include Index}
}