Seminar for officers concerned with the training of personnel in the use of International Patent Classification = Seminaire pour fonctionaires charges de la Classification Internationale des Brevets :
Seminar for officers concerned with the training of personnel in the use of International Patent Classification = Seminaire pour fonctionaires charges de la Classification Internationale des Brevets : Rijswijk, May 6.-9. 1974
- 249 S.
18.959
Kongress
Internationale Patentklassifikation
Rijswijk 1974
18.959
Kongress
Internationale Patentklassifikation
Rijswijk 1974