TY  - BOOK
ED  - World Intellectual Property Organization
TI  - International Patent Classification 1984: Class and subclass titles , synopsis of classesand subclasses with information on the number of subdivisions
PY  - 1984///
CY  - Geneva, 
KW  - Internationale Patentklassifikation
N1  - 19.186, 19.187
ER  -