@misc{indiciaebdbadfcf7137,
  title = {Duck stamps sold within States and counties during sales years 1966-67 through 1975-75.},
  author = {Samuel M. Carney and Michael F. Sorensen and Elwood M. Martin},
  year = {1978},
  url = {https://pubs.usgs.gov/publication/ssrw210},
  note = {Source identifier: ssrw210}
}