TY  - RPRT
TI  - Aeromagnetic map of Gladstone and vicinity, Delta, Alger, Menominee, and Marquette Counties, Michigan.
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1969
DO  - 10.3133/ofr69290
UR  - https://pubs.usgs.gov/publication/ofr69290
ID  - ofr69290
ER  -