@misc{indiciae25b804d384cb,
  title = {Geology of the Istaru Quadrangle, Costa Rica},
  author = {R.D. Krushensky},
  year = {1972},
  doi = {10.3133/b1358},
  url = {https://pubs.usgs.gov/publication/b1358},
  note = {Source identifier: b1358}
}