Reys, Robert E. Helping children learn mathematics / Robert E. Reys, Marilyn N. S uydam, and Mary M. Lindquist - Englewood Cliffs, N.J. : Prentice-Hall, 1984. - ix, 262 p. : ill. ; 28 cm. Bibliography: p. 256-257 Subjects--Topical Terms: Mathematics--Study and teaching (Elementary) Dewey Class. No.: Q 372.7 REY