TY - RPRT TI - Geology of contaminants in coal; Phase I, report of investigations AU - C. B. Cecil AU - R.W. Stanton AU - F.T. Dulong PY - 1981 DO - 10.3133/ofr81953a UR - https://pubs.usgs.gov/publication/ofr81953A ID - ofr81953A ER -