@misc{indiciae1640cba90a4f,
  title = {Waterfowl status report, 1968},
  author = {R. Kahler Martinson and James F. Voelzer and Mildred R. Hudgins},
  year = {1968},
  url = {https://pubs.usgs.gov/publication/ssrw122},
  note = {Source identifier: ssrw122}
}