@misc{indiciaedafc4c709221,
  title = {Spectral reflectance changes in greenhouse-grown metal-doped plants},
  author = {N.M. Milton and C. M. Ager and M.S. Power},
  year = {1988},
  doi = {10.3133/ofr8857},
  url = {https://pubs.usgs.gov/publication/ofr8857},
  note = {Source identifier: ofr8857}
}