Ackermann, Robert John,  1933-. <br/><br/>
Theories of knowledge :  a critical introduction / 
Robert Ackermann. 
 - Bombay :  Tata McGraw-Hill,  1965. 
 - 305 p. :  illus. ;  24 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Knowledge, Theory of.<br/>Knowledge, Theory of--Collections.