Ruzsa, Imre. <br/><br/>
Modal logic with descriptions / 
by Imre Ruzsa. 
 - The Hague :  Nijhoff,  1981. 
 - 135 p.;  25 cm. 
 - Nijhoff international philosophy series ;  v.10 .
<br/><br/> Includes index. 
<br/><br/>Bibliography : p. 129. 
<br/><br/><label>ISBN: </label>9024724732 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Modality (Logic).