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- World War, 1939-19455
- Campaigns3
- World War, 1914-19183
- Geology2
- Military campaigns2
- Railroads2
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- Bearings industry1
- Coal mines and mining1
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- Fishery processing plants1
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- Geology, Structural1
- History1
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- Iron industry and trade1
- Military readiness1
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- Nautical charts1
