TY - RPRT TI - Structure contours and overburden on the top of the Mahogany zone, Green River Formation, in the southern part of the Piceance Creek basin, Rio Blanco and Garfield counties, Colorado AU - M.C. Mullens AU - J. R. Donnell PY - 1976 DO - 10.3133/mf746 UR - https://pubs.usgs.gov/publication/mf746 ID - mf746 ER -