@misc{indiciae20ab3e5364b2,
  title = {Alkaline volcanic rocks from the Columbia Hills, Gusev crater, Mars},
  author = {H.Y. McSween and S. W. Ruff and R.V. Morris and J.F. Bell and Kenneth E. Herkenhoff and Ralf Gellert and K.R. Stockstill and L.L. Tornabene and S. W. Squyres and J.A. Crisp and P. R. Christensen and T.J. McCoy and D. W. Mittlefehldt and M. Schmidt},
  year = {2006},
  doi = {10.1029/2006je002698},
  url = {https://pubs.usgs.gov/publication/70028393},
  note = {Source identifier: 70028393}
}