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.
Marilyn and Robert Hunt of Wetzel County, W. Va., appeared at a public hearing in Stark County several years ago.
They told the Plain Township audience of the horrors of hydraulic fracturing or fracking in the early days of drilling.
Now they have published a personal account with the National Health Federation.
It's called Desperate to Stop Fracking (A Personal Story).
Click here to read the couple's account.