TY  - BOOK
AU  - Hurley,Patrick J.
TI  - A concise introduction to logic
SN  - 0534145140 (free copy ed.)
U1  - 160 20
PY  - 1991///
CY  - Belmont, Calif.
PB  - Wadsworth Publ. Co.
KW  - Logic
N1  - Includes bibliogr. references and index
ER  -