TY  - BOOK
AU  - Barker,Stephen Francis
TI  - The elements of logic
SN  - 0070037183
AV  - BC108 .B25 1974
U1  - 160 
PY  - 1974///]
CY  - New York
PB  - McGraw-Hill
KW  - Logic
N1  - Includes bibliographical references
ER  -