TY  - BOOK
AU  - Lewis,W.D.
TI  - Mathematics makes sense:  : an introudction to propositional algebra for secondary schools
AV  - MATH QA93.L4 
PY  - 1966///
CY  - London
PB  -  : Heibnemann Educational Books
KW  - Mathematics
KW  - Popular works
ER  -