TY - RPRT TI - Thickness of Shannon Sandstone Member of the Upper Cretaceous Steele Shale, Powder River basin, Wyoming and Montana AU - J. E. Fox AU - Debra K. Higley PY - 1987 DO - 10.3133/ofr87340h UR - https://pubs.usgs.gov/publication/ofr87340H ID - ofr87340H ER -