00579nam a2200193 4500 1430 20181127163309.0 780711s1980 enka b 00110 eng 76047197 0521224764 0521295157 (pbk.) Chellas, Brian F. Modal logic : an introduction / Brian F. Chellas. Cambridge [Eng.] ; New York : Cambridge University Press, [1980] xii, 295 p. : ill. ; 24 cm. Includes indexes. Bibliography: p. [278]-279. Modality (Logic) 1060 1060 0 0 ddc 0 0 MAIN RTCLIB RTCLIB MAIN 2023-03-17 2947 0 160 CHE 30005070 2023-03-17 00:00:00 2018-11-27 MAIN