@misc{indiciae053675302b87,
  title = {Illinois, Indiana, and Ohio Magnetic and Gravity Maps and Data: A Website for Distribution of Data},
  author = {David L. Daniels and Robert P. Kucks and Patricia L. Hill},
  year = {2008},
  doi = {10.3133/ds321},
  url = {https://pubs.usgs.gov/publication/ds321},
  note = {Source identifier: ds321}
}