TY - RPRT TI - Ground-water hydrology of strip-mine areas in eastern Ohio (conditions during mining of two watersheds in Coshocton and Muskingum counties) AU - John O. Helgesen AU - Allan C. Razem PY - 1981 DO - 10.3133/ofr81913 UR - https://pubs.usgs.gov/publication/ofr81913 ID - ofr81913 ER -