TY - RPRT TI - Thickness, oil-yield, and kriged resource estimates for the Eocene Green River formation, Piceance Creek basin, Colorado AU - Janet K. Pitman AU - Frances Wahl Pierce AU - W.D. Grundy PY - 1990 DO - 10.3133/oc132 UR - https://pubs.usgs.gov/publication/oc132 ID - oc132 ER -