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.
Shale jobs in Ohio grew by 30 percent from the first quarter 2011 to the first quarter 2013, according to a new state survey.
The survey was compiled by the Ohio Department of Job and Family Services.
The number of core drilling jobs climbed from 6,263 in early 2011 to 7,329 in 2012 to 8,192 in 2013, the survey said.
The number of related jobs including trucking, engineering and drilling services grew to 161,043, up 0.66 percent from 2012.
To read the full Monday story from Columbus Business First, click here.