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	1.	No cover image available The marble hillbed : on offshore bar-tidal channel complex in the Upper Ordovician drakes formation of Kentuchy by Swadley, W. C Series: U. S. Geological survey professional paper, 1126-D Material type: Article; Format: print ; Literary form: Not fiction Language: Eng In: Shorter contributions to stratigraphy and structural geology, 1979 p. D1-D8 : ill., carte Availability: No items available.
	2.	No cover image available New evidence supporting Nebraskan age for origin of Ohio river in North Central Kentucky by Swadley, W. C Series: U. S. Geological survey professional paper, 1126-H Material type: Article; Format: print ; Literary form: Not fiction Language: Eng In: Shorter contributions to stratigraphy and structural geology, 1979 p. H1-H7 : carte Availability: No items available.

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