@misc{indiciae1d5b388878f1,
  title = {Operational Procedures for Collecting Water-Quality Samples at Monitoring Sites on Maple Creek Near Nickerson and the Platte River at Louisville, Eastern Nebraska},
  author = {Steven M. Johnson and Robert B. Swanson},
  year = {1994},
  doi = {10.3133/ofr94121},
  url = {https://pubs.usgs.gov/publication/ofr94121},
  note = {Source identifier: ofr94121}
}