@misc{indiciaef982e8971454,
  title = {Qualitative and quantitative bacteriniological studies on a fluidized sand biofilter used a semiclosed trout culture system},
  author = {G. Bullock and J. Hankins and J. Heinen and C. Starliper and J. Teska},
  year = {1993},
  url = {https://pubs.usgs.gov/publication/2002637},
  note = {Source identifier: 2002637}
}