Chellas, Brian F, <br/><br/>
Modal logic :  an introduction /  [print] 
Brian F. Chellas. 
 - Cambridge [Eng. ;  New York :  Cambridge University Press,  (c)1980. 
 - xii, 295 pages :  illistrations ;  24 cm. 
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<br/><br/><label>LCCN: </label>76047197 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Modality (Logic)
<br/><br/><label>LC Class. No.: </label>BC199.C516.M633 1980 BC199