@misc{indiciaece567ac19e19,
  title = {Seismicity map of the State of Minnesota},
  author = {C. W. Stover and B.G. Reagor and S. T. Algermissen},
  year = {1981},
  doi = {10.3133/mf1323},
  url = {https://pubs.usgs.gov/publication/mf1323},
  note = {Source identifier: mf1323}
}