TY  - BOOK
ED  - WIPO 
TI  - StrasbourgAgreement Concerning the International Patent Classification of March 24, 1971
T2  - WIPO publication : 
SN  - 9789280504446
PY  - 1971///
CY  - Geneva
PB  - World Intellectual Property Organization
KW  - Patents - Classification
ER  -