Zeman, J. Jay <br/><br/>
Modal logic: the Lewis modal systems 

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 - Oxford  Clarendon Press  1973 
 - vii, 302 p.   
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<br/><br/><label>Subjects--Index Terms: </label>Mathematics  Number theory  Set theory  Group theory  Mathematical sciences  Pure mathematics  Fundamentals of mathematics 
<br/><br/><label>Dewey Class. No.: </label>510.67