@misc{indiciaead688d231a97,
  title = {A synoptic survey of trace metals in bottom sediments of the Willamette River, Oregon},
  author = {David A. Rickert and V. C. Kennedy and S. W. McKenzie and W. G. Hines},
  year = {1977},
  doi = {10.3133/cir715f},
  url = {https://pubs.usgs.gov/publication/cir715F},
  note = {Source identifier: cir715F}
}