@misc{indiciaec97ffc0acbfe,
  title = {Human utilization of subsurface extraterrestrial environments.},
  author = {P J Boston and R D Frederick and S M Welch and J Werker and T R Meyer and B Sprungman and V Hildreth-Werker and S L Thompson and D L Murphy},
  year = {2003},
  url = {https://pubmed.ncbi.nlm.nih.gov/12959139/},
  note = {Source identifier: 12959139}
}