TY  - BOOK
AU  - Feys,Robert
AU  - Dopp,Joseph
TI  - Modal logics
PY  - 1965///
CY  - Louvain
PB  - E. Nauwelaerts
KW  - Modality (Logic)
KW  - Logic, Symbolic and mathematical
N1  - Bibliogr.: p. [187]-215
ER  -