@misc{indiciae07f8a7a7757e,
  title = {Municipal GIS data base of El Salvador; Volume 4, San Salvador, El Salvador},
  author = {Peter G. Chirico and P.P. Hearn and Ovidio Rivero Bartolomei and S.D. Tanner},
  year = {2002},
  doi = {10.3133/ofr02307d},
  url = {https://pubs.usgs.gov/publication/ofr02307D},
  note = {Source identifier: ofr02307D}
}