TY  - BOOK
AU  - Pospesel,Howard
AU  - Lycan,William G.
TI  - Introduction to logic: propositional logic 
SN  - 0131649973
PY  - 1998///
CY  - Upper Saddle River, N.J.
PB  - Prentice Hall
KW  - Proposition (Logic)
KW  - Logic, Symbolic and mathematical
KW  - Reasoning
N1  - Includes bibliographical references and index
ER  -