TY - RPRT TI - Generalized stratigraphic section of the Prichard Formation, basal Belt Supergroup, Proterozoic Y, near Plains, Montana AU - Earle Rupert Cressman PY - 1982 DO - 10.3133/ofr82495 UR - https://pubs.usgs.gov/publication/ofr82495 ID - ofr82495 ER -