@misc{indiciaeed90effda317,
  title = {Water sample filtration unit},
  author = {M. W. Skougstad and G.F. Scarbro},
  year = {2002},
  doi = {10.1021/es60016a004},
  url = {https://pubs.usgs.gov/publication/70011487},
  note = {Source identifier: 70011487}
}