Materialy Nauchno-tekhnicheskoi konferentsii. 

 -  1972. 
 - 437 p. :  with ill. ;  21 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>LCCN: </label>tmp96023079  
<br/><br/><label>LC Class. No.: </label>T6  / .V67 1972