Dr. Engelder is Penn State's local expert on the Marcellus shale. His personal page includes several resources and reports on the Marcellus Shale and images of shale outcrops.

From Geology.com, contains interviews from top researchers in the field, informative images and diagrams, and general information and links to many different shale resources.

The Marcellus Shale Coalition provides in-depth information to policymakers, regulators, media, and other public stakeholders on the positive impacts responsible natural gas production is having on families, businesses, and communities across the region.

West Va. Surface Owners' Rights Organization

CRS Report for Congress R40894, October 30, 2009

From the U.S. Energy Information Administration

The New York Times wrote a series "examining the risks of natural-gas drilling and efforts to regulate this rapidly growing industry."