TY  - RPRT
TI  - Analog records from an airborne electromagnetic and magnetic survey of parts of the Upper Peninsula of Michigan and northern Wisconsin [microform]
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1981
DO  - 10.3133/ofr81577b
UR  - https://pubs.usgs.gov/publication/ofr81577B
ID  - ofr81577B
ER  -