Wright, G. H. von  1916-2003 <br/><br/>
An essay in modal logic  : 

 - Amsterdam :   North-Holland,   1951. 
 - vi, 90 p. 
 - Studies in logic and the foundations of mathematics .
<br/><br/><label>Subjects--Topical Terms: </label><br/>MATEMATICAS
<br/><br/><label>Subjects--Index Terms: </label>CIENCIAS MATEMATICAS