@misc{indiciaec0755e6f9cf5,
  title = {Acid precipitation and food quality: Effects of dietary Al, Ca and P on bone and liver characteristics in American black ducks and mallards},
  author = {Donald W. Sparling},
  year = {1991},
  doi = {10.1007/bf01055347},
  url = {https://pubs.usgs.gov/publication/5221100},
  note = {Source identifier: 5221100}
}