TY - RPRT TI - Geologic map of the Iron River-Crystal Falls district, Iron County, Michigan AU - Harold L. James AU - Carl E. Dutton AU - F.J. Pettijohn AU - Kenneth L. Wier PY - 1959 DO - 10.3133/mf225 UR - https://pubs.usgs.gov/publication/mf225 ID - mf225 ER -