TY - RPRT TI - Geologic map of the Rapid City NW Quadrangle, Meade and Pennington counties, South Dakota AU - Edward E. McGregor AU - J. Mark Cattermole PY - 1972 DO - 10.3133/ofr72240 UR - https://pubs.usgs.gov/publication/ofr72240 ID - ofr72240 ER -