Ayer, A. J.  1910-1989. <br/><br/>
The foundations of empirical knowledge / 
by Alfred J. Ayer. 
 - London :  Macmillan, St. Martin's Press,  1971. 
 - x, 276 p. ;  18 cm. 
 - MacMillan student editions .
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Knowledge, Theory of.<br/>Perception.