Ayer, A. J.    1910-1989 <br/><br/>
The foundations of empirical knowledge /    
by Alfred J. Ayer. 
 - London :   MacMillan Press,   1961. 
 - x, 276 p. ;    23 cm. 
<br/><br/>Includes bibliographical footnotes. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Knowledge, Theory of--------<br/>Perception.--------
<br/><br/><label>Dewey Class. No.: </label>121