@misc{indiciae2cbf8626674d,
  title = {Determining travel time and stream mixing using tracers and empirical equations},
  author = {Ingrid M. Verstraeten and P. J. Soenksen and G.B. Engel and L.D. Miller},
  year = {1999},
  doi = {10.2134/jeq1999.00472425002800050001x},
  url = {https://pubs.usgs.gov/publication/70021980},
  note = {Source identifier: 70021980}
}