@misc{indiciae1680dc598a49,
  title = {Comparative productivity of American black ducks and mallards breedings on the Chesapeake Bay},
  author = {D.G. Krementz and Daniel B. Stotts and Vernon D. Stotts and G.W. Pendleton},
  year = {1997},
  url = {https://pubs.usgs.gov/publication/5211116},
  note = {Source identifier: 5211116}
}