TY  - BOOK
AU  - W. W Sawyer
TI  - Vision in elementary mathematics
U1  - 510 
PY  - 1964///
CY  - England
PB  - Penguin books Limited
N1  - W. W Sawyer: Vision in elementary mathematics.  England.  Penguin books Limited, 1964.--(510SAW)
ER  -