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 Disasters induced by geophysical effects
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 1957/58 : IGY-Campaign
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 search Organization.GeologicalSurvey.Germany.NorthRhine-Westphalia , 1 entries found with filter=1111
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Germany 1977 , [Type:Postmark]

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100 years auf Geological Survey in North Rhine-Westphalia

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     Germany 1977 , [Type:Postmark]

10

100 years auf Geological Survey in North Rhine-Westphalia

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.Action Rang/Image Country Year [Nr.] Type Topics
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10
Germany 1977 [999] Postmark  Organization.GeologicalSurvey.Germany.NorthRhine-Westphalia

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100 years auf Geological Survey in North Rhine-Westphalia