TY - RPRT TI - The Muddy and Quitchupah Projects: a progress report with descriptions of cores of the I, J, and C coal beds from the Emery coal field, central Utah AU - Thomas A. Ryer PY - 1981 DO - 10.3133/ofr81460 UR - https://pubs.usgs.gov/publication/ofr81460 ID - ofr81460 ER -