TY - RPRT TI - The Pierre Shale near Kremmling, Colorado, and its correlation to the east and the west AU - G. A. Izett AU - W. A. Cobban AU - J. R. Gill PY - 1971 DO - 10.3133/pp684a UR - https://pubs.usgs.gov/publication/pp684A ID - pp684A ER -