@misc{indiciaea513ea12b1a2,
  title = {Distribution of duck stamp sales within States during fiscal years 1962-71},
  author = {Lonnie D. Schroeder and Samuel M. Carney and Elwood M. Martin},
  year = {1974},
  url = {https://pubs.usgs.gov/publication/ssrw180},
  note = {Source identifier: ssrw180}
}