Overview of the Bakken, current, North Dakota Geological Survey.
Geo News: North Dakota Department of Mineral Resources, January, 2010, Volume 31, Number 1.
Short history of the Bakken, undated, but appears to be September, 2004, by Julie LeFever. This is an important article since it was published just about the time the Bakken in Montana was reaching its peak and interest was moving to North Dakota Bakken. A great article (as all articles by Ms LeFever are).
*****
If I Could Turn Back Time, Cher
I love the US Navy.