Sanford, David H. ,  1937- <br/><br/>
If P, then Q :  conditionals and the foundations of reasoning / 
David H. Sanford 
 - London :  Routledge,  c1989 
 - ix, 265 p. :  ill. ;  22 cm. 
 - The problems of philosophy .
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0415030129 :  PND 35.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Conditionals (Logic)
<br/><br/><label>Dewey Class. No.: </label>160