TY  - RPRT
TI  - Contributions to Precambrian geology of Lake Superior region
AU  - Paul K. Sims
AU  - Lorna M.H. Carter
PY  - 1990
DO  - 10.3133/b1904
UR  - https://pubs.usgs.gov/publication/b1904
ID  - b1904
ER  -