@misc{indiciae901035b21a68,
  title = {Debris flow and erosion control problems caused by the ash eruptions of Irazu Volcano, Costa Rica},
  author = {H.H. Waldron},
  year = {1967},
  doi = {10.3133/b1241i},
  url = {https://pubs.usgs.gov/publication/b1241I},
  note = {Source identifier: b1241I}
}