TY  - BOOK
AU  - Guttenplan,Samual .
TI  - The languages of logic : an introduction to formal logic / 
SN  - 0631146253
U1  - 160 
PY  - 1986///
CY  - Oxford : 
PB  - Basil Blackwell , 
KW  - LOGIC
N1  - includes index
ER  -