@misc{indiciae838cebad3415,
  title = {USGS Digital Spectral Library splib06a},
  author = {Roger N. Clark and Gregg A. Swayze and Richard A. Wise and K. Eric Livo and Todd M. Hoefen and Raymond F. Kokaly and Stephen J. Sutley},
  year = {2007},
  doi = {10.3133/ds231},
  url = {https://pubs.usgs.gov/publication/ds231},
  note = {Source identifier: ds231}
}