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 Seely, H. M. Some sponges of the Chazy formation. Rep. Vermont State 



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 Seely, H. M. Cryptozoa of the early Champlain sea. Report Geolog. 



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 Seely, H. M. Beckmantown and Chazy formations in the Champlain Valley, 



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 Sollas, W. J. The origin and formation of flints. In: The Age of the Earth. 



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 Slocom, A. W. A list of Devonian fossils collected in western New York, 



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 Walcott, C. D. Cambrian faunes of China. Proc. Nation. Mus. Smithsonian 



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 Whiteaves, J. F. The fossils of the Silu-rian (Upper Silurian) rocks of 



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 Zabälka, C. Pasmo x kridveho utvaru v. Pojizeri (Zone x der Kreide- 

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