Wittgenstein, Ludwig <br/><br/>
On certainty 

 - New York  Harper Torch Books  1972 
 - variged pagings. 
<br/><br/><label>ISBN: </label>61316865 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biography-Ludwig Wittgenstein
<br/><br/><label>Dewey Class. No.: </label>193  / WIT