TY  - BOOK
AU  - Gabbay, Dov M
TI  - What is a logical system?
SN  - 9780198538592
SN  - 94033666
U1  - 511.3 GAB 
PY  - 1994///
CY  - Oxford
PB  - Clarendon ; Oxford University Press
KW  - Computer science
KW  - Logic, Symbolic and mathematical
N1  - Includes bibliographical references and index
ER  -