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| | North Dakota Little Badlands - References |
 | | Ashworth, A.C., 1985, The Oligocene age and the fluvial origin of the Chadron Formation reaffirmed by observations in the Little Badlands, Stark County, North Dakota: Proceedings of the North Dakota Academy of Science, v.40, p.17. |
 | | Douglass, E., 1909, A geological reconnaissance in North Dakota, Montana, and Idaho; with notes on Mesozoic and Cenozoic geology: Carnegie Mus. |
 | | Stone, W.J., 1972, Middle Cenozoic Stratigrphy of North Dakota, in Ting, F.T.C., ed., Depostional environments of the lignite-bearing strata in western North Dakota: North Dakota Geological Survey Misc. |
| www.library.uiuc.edu /gex/bibs/littlebad.html (4161 words) |
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