Rescher Nicholas <br/><br/>
Logic of commands. 

 - London  Routledge         1966 
 - xii,147p.  cm. 
 - Monograph in modern logic. .
<br/><br/><label>Standard No.: </label>43282 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>R1, K6