@misc{indiciae9bb527beb9c8,
  title = {The Mauna Loa environmental matrix: foliar and soil nutrients},
  author = {P.M. Vitousek and G. Aplet and D. Turner and J.J. Lockwood},
  year = {1992},
  doi = {10.1007/bf00317415},
  url = {https://pubs.usgs.gov/publication/70017218},
  note = {Source identifier: 70017218}
}