@misc{indiciaedbf32fa2622c,
  title = {Appendix B. Spatial risk modeling for evaluating surface bypass collector systems},
  author = {J.H. Petersen and G. Gaston},
  year = {1997},
  url = {https://pubs.usgs.gov/publication/70180254},
  note = {Source identifier: 70180254}
}