@misc{indiciaecca28ba05a6f,
  title = {A statistical learning framework for groundwater nitrate models of the Central Valley, California, USA},
  author = {Bernard T. Nolan and Michael N. Fienen and David L. Lorenz},
  year = {2015},
  doi = {10.1016/j.jhydrol.2015.10.025},
  url = {https://pubs.usgs.gov/publication/70157562},
  note = {Source identifier: 70157562}
}