TY  - BOOK
AU  - Duncum,Alan
AU  - Burden, Roger
TI  - Logic problems
U1  - 160 
PY  - 1997///
CY  - London UK: 
PB  - British European Associated Publishers
KW  - Logic - Introductions
KW  - Reasoning - Introductions
KW  - Logic - Study and teaching
ER  -