Author: SPJELDNAES, N. Title: The Middle Ordovician of the Oslo region, Norway, 3. Graptolites dating the beds below the Middle ordovician.
Description: 1953, Extract Norsk Geol. Tidsskr. 31; pp. 171-184, 2 fig. 1 plts. h.t. Plain new wrps.
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Price: EUR 6.00 = appr. US$ 6.52 Seller: Lingua Terrae Books
- Book number: 7581
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Graptolites