Burton, Grace (et. al. ) creator author Burton, Grace M. author Douglas Clemence author John Firkins author Jeene Joyner author National Council of Teachers of Mathematics viii, 24 p. : ill. ; Grace Burton ... [et al.], with Douglas Clements, John Firkins, Jeane Joyner. Includes bibliographical references Includes bibliographical references (p. viii). Mathematics Study and teaching (Preschool) QA 135.5 BUR 1991 0873533100 0873533097 (set)