TY  - BOOK
AU  - Hurley,Patrick J., x
AU  - x
TI  - A concise introduction to logic: x
SN  - 0534033670
U1  - 106/H965c 
PY  - 1985///
CY  - Belmont, California
PB  - Wadsworth Pub.
KW  - Logic
N1  - P. 489-98
ER  -