TY  - BOOK
AU  - Velleman,Daniel J.
TI  - How to prove it: a structured approach
SN  - 0521441161
AV  - QA9 .V38 1994
U1  - 511.3 20
PY  - 1994///
CY  - Cambridge [England], New York
PB  - Cambridge University
KW  - Logic, Symbolic and mathematical
KW  - Local
KW  - Mathematics
N1  - Includes bibliographical references
ER  -