TY  - BOOK
AU  - Cocchiarella,Nino B.
AU  - Freund,Max A.
TI  - Modal logic: an introduction to its syntax and semantics 
SN  - 9780195366587
U1  - 160 22
PY  - 2008///
CY  - Oxford
PB  - The University Press
KW  - Modality (Logic)
N1  - Includes bibliographical references and index
ER  -