Ordovician fossils of north China, by Amadeus W. Grabau, with plates I-IX and 20 text figures.
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TextPublication details: Peking, Published by the Geological Survey of China, 1922.Description: 127 p. illus., IX plates. 31 cmSubject(s): LOC classification: - QE756.C6 A3 ser. B, vol. 1, fasc. 1
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Bibliography: p. 96-98.
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