Hughes, G. E. Cresswell, M. J. <br/><br/>
A New Introduction to Modal Logic / 
G.E. Hughes and M.J. Cresswell. 
 - London :  Routledge,  ©1996. 
 - x, 421 p. : 
<br/><br/><label>ISBN: </label>9780415126007 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Modality (Logic)
<br/><br/><label>Dewey Class. No.: </label>160  / HUG/N