@misc{indiciae3ebafa5ff79a,
  title = {A GIS-based groundwater travel time model to evaluate stream nitrate concentration reductions from land use change},
  author = {K. E. Schilling and C.F. Wolter},
  year = {2007},
  doi = {10.1007/s00254-007-0659-0},
  url = {https://pubs.usgs.gov/publication/70031587},
  note = {Source identifier: 70031587}
}