International Rubber Study Group   <br/><br/>
Proceedings of the 94th meeting of the IRSG held on 22 - 25 June 1981, London  (Book) 

 - London  IRSG  1981 
 - 160 p.  28 cm. 
<br/><br/><label>Universal Decimal Class. No.: </label>678 : 061.3 IRS  / 14453