@misc{indiciae0359897b6db7, title = {Aeromagnetic survey of parts of the Fond du Lac and Sheboygan 1:100,000 quadrangles, Wisconsin and Michigan}, author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey}, year = {1999}, doi = {10.3133/ofr99526a}, url = {https://pubs.usgs.gov/publication/ofr99526A}, note = {Source identifier: ofr99526A} }