Two Birdbear wells in the news today, Ross oil field, north North Dakota, March 3, 2017.
A Birdbear update in the Bicentennial-Beaver Creek-Roosevelt trend.
The Birdbear formation, by Julie A. LeFever, July, 2009.
Bismarck Tribune, November, 2009.
ABC News, November, 2009.
The stratigraphic view.
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