Official catchword index to the second edition (1974) of the international patent classification 

 - World Intellectual Property Organization (WIPO)  London  1974 
 - vii,226p 
 - Catchword index International patent classification 
<br/><br/><label>Nat. Bib. No.: </label>P 3101 
<br/><br/><label>Nat. Bib. Agency Control No.: </label>608.3OFF 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering & Technology
<br/><br/><label>Universal Decimal Class. No.: </label>608.3