@misc{indiciaec0e43a1c2764,
  title = {Gut morphology of mallards in relation to diet quality},
  author = {M. R. Miller},
  year = {1975},
  doi = {10.2307/3800481},
  url = {https://pubs.usgs.gov/publication/1007715},
  note = {Source identifier: 1007715}
}