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A 1989 lecture about the Briloner Eisenberg's geology and history, presented by Mr. Arnold from the Siegen Mining Office, with archival details.
Lecture "The Briloner Eisenberg" at the Siegen Mining Office 1989
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A 1989 lecture about the Briloner Eisenberg's geology and history, presented by Mr. Arnold from the Siegen Mining Office, with archival details.
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