@misc{indiciae734098d950f6,
  title = {Microbial Fossils from Terrestrial Subsurface Hydrothermal Environments: Examples and Implications for Mars},
  author = {Hofmann, Beda A. and Farmer, Jack and Chang, Sherwood},
  year = {1997},
  url = {https://ntrs.nasa.gov/citations/20020052469},
  note = {Source identifier: 20020052469}
}