Primary mathematics today /
Elizabeth Williams and Hilary Shuard.
- New metric ed.
- London : Longman, 1976.
- x, 455 p. ill. (some col.), 2 maps ; 25 cm.
includes appendix and index
1. First discoveries 2. Concrete operations 3. Extending ideas of number and space 4. The collection and treatment of data 5. More abstract ideas develop