@misc{indiciae9f94e48a9a12,
  title = {Shotshell and shooter effectiveness: Lead vs. steel shot for duck hunting},
  author = {D.D. Humburg and S.L. Sheriff and P.H. Geissler and T. Roster},
  year = {1982},
  url = {https://pubs.usgs.gov/publication/5221770},
  note = {Source identifier: 5221770}
}