@misc{indiciae40fe091de368,
  title = {Seismic survey in the region of recent earthquake activity near Denver, Colorado},
  author = {B.F. Rummerfield and A. Peter Olson and D.B. Hoover},
  year = {1968},
  doi = {10.1190/1.1439985},
  url = {https://pubs.usgs.gov/publication/70221384},
  note = {Source identifier: 70221384}
}