TY  - RPRT
TI  - Aeromagnetic and inferred Precambrian paleogeologic map of east-central Minnesota and part of Wisconsin
AU  - P.K. Sims
AU  - Isidore Zietz
PY  - 1967
DO  - 10.3133/gp563
UR  - https://pubs.usgs.gov/publication/gp563
ID  - gp563
ER  -