@misc{indiciaec7aa91b5065e,
  title = {Variation in trophic shift for stable isotope ratios of carbon, nitrogen, and sulfur},
  author = {J.H. McCutchan and W.M. Lewis and C. Kendall and C.C. McGrath},
  year = {2003},
  doi = {10.1034/j.1600-0706.2003.12098.x},
  url = {https://pubs.usgs.gov/publication/70025829},
  note = {Source identifier: 70025829}
}