@misc{indiciae0922a3d62dd6,
  title = {Extraterrestrial engineering},
  author = {Sture, Stein and Ko, Hon-Yim and Macari-Pasqualino, Jose Emir and Perkins, Steven W.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19940004206},
  note = {Source identifier: 19940004206}
}