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Decisions of the Standing Stratigraphic Commission on Ordovician and Silurian of U.S.S.R. |
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| Abstract: | The Committee on Ordovician and Silurian Stratigraphy of the U. S. S. R. defines a number of time-stratigraphic subdivisions of the Russian Ordovician and Silurian Systems. — C.G. Tillman. |
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