TY  - RPRT
TI  - Aeromagnetic map of the Perch Lake quadrangle, Houghton, Baraga, and Iron Counties, Michigan
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1967
DO  - 10.3133/gp600
UR  - https://pubs.usgs.gov/publication/gp600
ID  - gp600
ER  -