The Helderberg Group and the Position of the Silurian-Devonian Boundary in North America - an Historical Summary Including a Review of Pertinent Literature

The Helderberg Group and the Position of the Silurian-Devonian Boundary in North America - an Historical Summary Including a Review of Pertinent Literature
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ISBN-10 : OCLC:911663890
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The Helderberg Group and the Position of the Silurian-Devonian Boundary in North America - an Historical Summary Including a Review of Pertinent Literature Related Books

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