Ohio Division of Natural Resources, and P & L Systems, No description specified. 1-2 (2 Records) Documents Phase I and Phase II Archaeological Survey of a Proposed Coal Mining Area in Clayton Township, Perry County, Ohio: Permit Application No. 1090 (1992) Phase I and Phase II Archaeological Survey of a Proposed Coal Mining Area, Clayton Township, Perry County, Ohio, Permit Application No. 1192 (1992)