@book{117852,
	author = {Hansen, Viggo P.,},
	title = {Computers in mathematics education : 1984 yearbook /},
	publisher = {National Council of Teachers of Mathematics,},
	year = {c1984},
	series = {(Series: Yearbook (National Council of Teachers of Mathemati-)},
	address = {Reston, virginia :},
	edition = {1a ed.}
}