NO. 7 SILICIFIED ORDOVICIAN BRACHIOPODS ROSS AND DUTRO 1 9 



LITERATURE CITED 



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1951. Brachiopods of the Henryhouse formation (Silurian) of Oklahoma. 

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Berry, W. B. N. 



1960. Correlation of Ordovician graptolite-bearing sequences. XXI Internat. 

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Cooper, G. A. 



1956. Chazyan and related brachiopods. Smithsonian Misc. Coll., vol. 127, 

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Cooper, G. A., and Kindle, C. H. 



1936. New brachiopods and trilobites from the Upper Ordovician of Perce, 

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Davidson, T. 



1883. Monograph of British fossil brachiopoda, vol. 5, pt. 2, Silurian Supple- 

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Dean, W. T. 



1960. The use of shelly faunas in a comparison of the Caradoc series in 

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Hall, J., and Clarke, J. M. 



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1916. The Strophomenidae of the Kristiania Region. Videnskap. Kristiania 

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1932. The Tatonduk-Nation district, Alaska. U.S. Geol. Survey Bull. 836, 



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