TY  - BOOK
AU  - Eccles,Peter J..
TI  - An introduction to mathematical reasoning : numbers,sets and functions / 
SN  - 0521597188
U1  - 511.3 
PY  - 1997///
CY  - Cambridge : 
PB  - Cambridge University Press , 
KW  - PROOF THEORY
N1  - NULL
ER  -