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Remarks on HAYASAKA's Protocycloceras cfr., cyclophorum and the Permiam and Carboniferous Orthoconic Nautiloids of Carboniferous Orthoconic Nautiloids of Asia

Saburô Shimizu, Tadahiro OBATA

The Journal of the Geological Society of Japan · 1936 · 10 citations · 1 references

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Correlation of the more important marine Permian sequences

Charles Schuchert · Geological Society of America Bulletin · 1935 · 20 citations

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