Sanford David H <br/><br/>
If P, then Q    Conditionals and the foundations of reasonling.      

 - London  Routledge         1989 
 - ix,265p.  cm. 
<br/><br/><label>Standard No.: </label>43937 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>R1, M9