http://blogs.oilandgasinvestor.com/peggy/2008/06/27/some-sixty-rigs-are-drilling-for-north-dakotas-bakken/ Peggy Williams offers her thoughts on drilling and exploration trends, sprinkled with a little petroleum geology. Sat, 11 Feb 2012 06:24:11 +0000 http://wordpress.org/?v=2.6.2