Ayer, A.J. <br/><br/>
The Problem of Knowledge 
/by A.J. Ayer 
 - London:  Penguin Books;  1956. 
 - 223p. 
<br/><br/><label>ISBN: </label>000 
<br/><br/><label>Dewey Class. No.: </label>AYE/T  / 121