Comparing first level patent data with value-added patent information :
Emmerich, Christiane
Comparing first level patent data with value-added patent information : a case study in the pharmaceutical field
Patentdokumentation
Datenbank
Derwent
Pharmazie
CAPLUS
Comparing first level patent data with value-added patent information : a case study in the pharmaceutical field
Patentdokumentation
Datenbank
Derwent
Pharmazie
CAPLUS