Ayer A J <br/><br/>
Problem of knowledge 

 - Harmondsworth  Penguin         1956 
 - 223p  cm. 
<br/><br/><label>Standard No.: </label>75320 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>R2, J6