@misc{indiciae7110a2aeb3b1,
  title = {Seismicity map of the state of North Dakota},
  author = {B.G. Reagor and C. W. Stover and S. T. Algermissen},
  year = {1981},
  doi = {10.3133/mf1326},
  url = {https://pubs.usgs.gov/publication/mf1326},
  note = {Source identifier: mf1326}
}