Bergson,Abram <br/><br/>
Productivity and The Social System- The Ussr and The West 
/ by Abram Bergson 
 - cambridge   Harvard University press  1978 
 - vi,256p. 
<br/><br/><label>ISBN: </label>000 
<br/><br/><label>Dewey Class. No.: </label>338.094  / BER/P