Hugnes G E <br/><br/>
Introduction on to Modal logic 
Hugnes G E; Cresswell M J 
 - London  Methuen         1972 
 - xii,388p. illus  cm. 
<br/><br/><label>Standard No.: </label>1,770 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>LOGIC
<br/><br/><label>Dewey Class. No.: </label>R1, L21