@misc{indiciae33f3b1349096,
  title = {Long-term frozen storage of stream water samples for dissolved orthophosphate, nitrate plus nitrite, and ammonia analysis},
  author = {Ronald J. Avanzino and Vance C. Kennedy},
  year = {2010},
  doi = {10.1029/93wr01684},
  url = {https://pubs.usgs.gov/publication/70185433},
  note = {Source identifier: 70185433}
}