@misc{indiciae4ffd69c1be63,
  title = {Results of a reconnaissance microearthquake survey of Bucaramanga, Colombia},
  author = {W.D. Pennington and Walter D. Mooney and Rene van Hissenhoven and H. Meyer and J.E. Ramirez and Robert P. Meyer},
  year = {2012},
  doi = {10.1029/gl006i002p00065},
  url = {https://pubs.usgs.gov/publication/70209995},
  note = {Source identifier: 70209995}
}