TY - RPRT TI - Aeromagnetic survey of the Sparta 1:100,000 quadrangle, Wisconsin AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey PY - 1999 DO - 10.3133/ofr99526f UR - https://pubs.usgs.gov/publication/ofr99526F ID - ofr99526F ER -