@misc{indiciae19a8c401d92d,
  title = {Biases in mail questionnaires of upland game hunters},
  author = {R. K. Martinson and D.E. Whitesell},
  year = {1964},
  url = {https://pubs.usgs.gov/publication/5220438},
  note = {Source identifier: 5220438}
}