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- catalog contributor b8259430.
- catalog created "1948.".
- catalog date "1948".
- catalog date "1948.".
- catalog dateCopyrighted "1948.".
- catalog description "Includes bibliographies.".
- catalog description "Proefschrift--Rotterdam.".
- catalog extent "77 l.".
- catalog hasFormat "Role of patents in technological progress.".
- catalog isFormatOf "Role of patents in technological progress.".
- catalog issued "1948".
- catalog issued "1948.".
- catalog language "eng".
- catalog publisher "Den Hague,".
- catalog relation "Role of patents in technological progress.".
- catalog spatial "Netherlands.".
- catalog subject "Patents Netherlands.".
- catalog subject "Patents.".
- catalog subject "T215 .M11r".
- catalog title "The role of patents in technological progress with special attention to patent activity in the Netherlands.".
- catalog type "text".