@book{Peterson1993,
  title={Observations and Modeling of Seismic Background Noise},
  author={Peterson, Jon},
  url={http://ehp3-earthquake.wr.usgs.gov/regional/asl/pubs/files/ofr93-322.pdf},
  year={1993},
  address={Albuquerque, N.M.},
  series={U.S. Geological Survey open-file report 93-322},
}
