Chesapeake Energy Corp,the Oklahoma-based firm is the No. 1 driller in Ohio.
Rig Count Interactive Map by Baker Hughes, an energy services company.
Shale Sheet Fracking, a Youngstown Vindicator blog.
The Ohio Environmental Council, a statewide eco-group based in Columbus.
Earthjustice, a national eco-group.
People's Oil and Gas Collaborative-Ohio, a grass-roots group in Northeast Ohio.
Concerned Citizens of Medina County, a grass-roots group.
No Frack Ohio, a Columbus-based grass-roots group.
Fracking: Gas Drilling's Environmental Threat by ProPublica, an online journalism site.
Pipeline, blog from Pittsburgh Post-Gazette on Marcellus shale drilling.
Allegheny Front, environmental public radio for Western Pennsylvania.
A Swiss company involved in gas-and-oil operations has purchased property in Youngstown, according to the Youngstown Vindicator.
Weatherford Artificial Lift Systems Inc., a sbubsidiary of Weatherford International Ltd., has purchased two parcels for $3.4 million.
The building sits on 20 acres off Poland Avenue south of downtown Youngstown.
Weatherford International makes products used in the drilling process and has operations in nine states including Pennsylvania, West Virginia and Texas.
The Youngstown site would be the firm's first location in Ohio.