Leff, Gordon <br/><br/>
The tyranny of concepts :  a critique of Marxism / 
Gordon Leff 
 - 2nd ed. 
 - London :  The Merlin Press,  1969 
 - 256 p. ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Dialectical materialism