@misc{indiciae9743c9920820,
  title = {Estimating the sources and transport of nutrients in the Waikato River Basin, New Zealand},
  author = {Richard B. Alexander and Alexander H. Elliott and Ude Shankar and Graham B. McBride},
  year = {2002},
  doi = {10.1029/2001wr000878},
  url = {https://pubs.usgs.gov/publication/70023922},
  note = {Source identifier: 70023922}
}