@misc{indiciae94e6c39cb183,
  title = {Principal facts for 1040 gravity stations in the Gillette and Sheridan 1x2 degree quadrangles, and Crow Indian Reservation, Wyoming, Montana, and South Dakota},
  author = {Courteney Williamson and S. L. Robbins},
  year = {1991},
  doi = {10.3133/ofr91287},
  url = {https://pubs.usgs.gov/publication/ofr91287},
  note = {Source identifier: ofr91287}
}