@misc{indiciae4f3c73601f92,
  title = {Signature tests on 400-in3 water gun and 540-in3 air gun},
  author = {D. R. Hutchinson},
  year = {1984},
  doi = {10.3133/ofr84375},
  url = {https://pubs.usgs.gov/publication/ofr84375},
  note = {Source identifier: ofr84375}
}