TY  - BOOK
AU  - Edgar,William J
TI  - The elements of logic: for use in computer science, mathematics, and philosophy 
AV  - BC38 .E446 1989
PY  - 1989///
CY  - Chicago
PB  - Science Research Associates
KW  - Logic, Modern
KW  - Logic, Symbolic and mathematical
N1  - 4; 1; 2
ER  -