@misc{indiciae7a140db348d3,
  title = {A sampling plan for conduit-flow karst springs: Minimizing sampling cost and maximizing statistical utility},
  author = {J.C. Currens},
  year = {1999},
  doi = {10.1016/s0013-7952(98)00064-7},
  url = {https://pubs.usgs.gov/publication/70021734},
  note = {Source identifier: 70021734}
}