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. 
<br/><br/> 18.959 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Kongress<br/>Internationale Patentklassifikation<br/>Rijswijk 1974