TY  - BOOK
ED  - Patent Office <Yeruschalayim>
TI  - System of Classification of Subject-Matter for Patents of Inventions: Section, Subsections and Classes in acordance with the European Convention on the International Classification of Patents for Inventions
PY  - 1968///
CY  - Jerusalem, 
KW  - Israel
KW  - Patentklassen
KW  - Patentklassifikation
ER  -