@misc{indiciaee5104a001a71,
  title = {Principal facts for gravity stations in the Wolf Creek Anticline area, Piceance Basin, Colorado},
  author = {G. A. Abrams and M. A. Grout},
  year = {1990},
  doi = {10.3133/ofr90261},
  url = {https://pubs.usgs.gov/publication/ofr90261},
  note = {Source identifier: ofr90261}
}