Ayer A. J. <br/><br/>
Problem of knowledge 
Ayer A. J. 
 - Harmondsworth  Penguin Books        1956 
 - 223p  cm. 
<br/><br/><label>Standard No.: </label>188072 
<br/><br/><label>Source: </label> Reference Collections 
<br/><br/><label>Dewey Class. No.: </label>"R, J6/SC"