@misc{indiciae8736c4500f73,
  title = {Low strain level acoustic emission due to seismic waves and tidal/thermoelastic strains observed at the San Francisco Presidio, California},
  author = {B.H. Armstrong and C. M. Valdes-Gonzales and M. J. Johnston and J.D. Leaird},
  year = {1993},
  doi = {10.3133/ofr93583},
  url = {https://pubs.usgs.gov/publication/ofr93583},
  note = {Source identifier: ofr93583}
}