TY  - RPRT
TI  - Preliminary integrated geologic map databases for the United States: Minnesota, Wisconsin, Michigan, Illinois, and Indiana
AU  - Suzanne W. Nicholson
AU  - Connie L. Dicken
AU  - Michael P. Foose
AU  - Julie Mueller
PY  - 2004
DO  - 10.3133/ofr20041355
UR  - https://pubs.usgs.gov/publication/ofr20041355
ID  - ofr20041355
ER  -