Title: Aerial Magnetic, Electromagnetic, and Gamma-Ray Survey, Berrien County, Michigan (U.S. Geological Survey Open-File Report)
First published: January 2002
Description: Includes maps, grids, and flightline databases of the data as well as grids of satellite data.  Includes 2 registered images of the geology of the area.  A free viewer is provided on the CD-ROM.
Subjects: Magnetic prospecting, Radioactive prospecting, Electric prospecting