TY  - BOOK
AU  - Rodgers,Nancy
TI  - Learning to reason: an introduction to logic, sets and relations 
SN  - 047137122X
AV  - QA9  .R62 2000
PY  - 2000///
CY  - New York
PB  - John Wiley
KW  - Logic, Symbolic and mathematical
KW  - Proof theory
KW  - Set theory
ER  -