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- 50030222 contributor B1190031.
- 50030222 created "1949.".
- 50030222 date "1949".
- 50030222 date "1949.".
- 50030222 dateCopyrighted "1949.".
- 50030222 extent "158 p.".
- 50030222 issued "1949".
- 50030222 issued "1949.".
- 50030222 language "ger".
- 50030222 publisher "Aarau, Keller,".
- 50030222 subject "HD9999.O63 S98".
- 50030222 subject "Optical instruments.".
- 50030222 subject "Scientific apparatus and instruments.".
- 50030222 title "Die Entwicklung und Bedeutung der optisch-feinmechanischen Industrie in der Schweiz.".
- 50030222 type "text".