Williams, Elizabeth M. Primary mathematics today: towards 21st century / by Elizabeth Williams and Hilary Shuard; illustrated by Kay Young. - 4th edition - x, 462 p., 8 plates. illus. (some col.), maps (some col.) lncludes index ISBN: 0582430291 Subjects--Topical Terms: Mathematics--Study and teaching (Primary) LC Class. No.: QA135.5WIL 1994