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A 1989 lecture about the Briloner Eisenberg's geology and history, presented by Mr. Arnold at the Siegen Mining Office, with details on the speaker and production.
Lecture on the Briloner Eisenberg at Siegen Mining Office 1989
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A 1989 lecture about the Briloner Eisenberg's geology and history, presented by Mr. Arnold at the Siegen Mining Office, with details on the speaker and production.
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