TY  - RPRT
TI  - Aeromagnetic map of northwestern Illinois
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1982
DO  - 10.3133/ofr82190
UR  - https://pubs.usgs.gov/publication/ofr82190
ID  - ofr82190
ER  -