TY  - BOOK
AU  - Feys, Robert,
AU  - Dopp, Joseph
TI  - Modal logic
U1  - 164 FEY 
PY  - 1965///
CY  - Louvain
PB  - E. Nauwelaerts
KW  - Modality (Logic)
KW  - Logic, Symbolic and mathematical
N1  - On label mounted on t.p.: Humanities Press, New York; Bibliography: p. 187-215
ER  -