@misc{indiciaea27ed92c99f3,
  title = {Distribution and variability of nitrogen and phosphorus in the alluvial, High Plains, Rush Springs, and Blaine aquifers in western Oklahoma},
  author = {C.J. Becker},
  year = {1994},
  doi = {10.3133/ofr9441},
  url = {https://pubs.usgs.gov/publication/ofr9441},
  note = {Source identifier: ofr9441}
}