Wittgenstein,  Ludwig <br/><br/>
On certainty 
Ludwig Wittgenstein, edited by G. E. M. Ascombe and G. H. Von Wright; translated by Denis Paul and G. E. M. Anscombe 
 - Oxford  Basil Blackwell  c1969 
 - [4],105p.;   22cm. 
<br/><br/><label>ISBN: </label>0-631-16940-7 
<br/><br/><label>Dewey Class. No.: </label>192  / WIT/ANS