StrasbourgAgreement Concerning the International Patent Classification of March 24, 1971 

 - Geneva ;  World Intellectual Property Organization ,  1971. 
 - 19p. :  21 cm. 
 - WIPO publication :   No. 275 (E) .
<br/><br/><label>ISBN: </label>9789280504446 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Patents - Classification