@misc{indiciae6334afda222c,
  title = {Evidence for Ancient Martian Life},
  author = {Gibson, E. K., Jr. and Westall, F. and McKay, D. S. and Thomas-Keprta, K. and Wentworth, S. and Romanek, C. S.},
  year = {1999},
  url = {https://ntrs.nasa.gov/citations/20000110336},
  note = {Source identifier: 20000110336}
}