TY  - RPRT
TI  - Map showing mineral deposits of the midcontinent rift, Lake Superior region, United States and Canada
AU  - W.F. Cannon
AU  - T. A. McGervey
PY  - 1991
DO  - 10.3133/mf2153
UR  - https://pubs.usgs.gov/publication/mf2153
ID  - mf2153
ER  -