@misc{indiciae081768d08c15,
  title = {Preparation of earthquake catalogs for the National Seismic-Hazard Maps: Contiguous 48 states},
  author = {Charles C. Mueller and Margaret G. Hopper and Arthur D. Frankel},
  year = {1997},
  doi = {10.3133/ofr97464},
  url = {https://pubs.usgs.gov/publication/ofr97464},
  note = {Source identifier: ofr97464}
}