@misc{indiciae519852ba2f76,
  title = {Mars scientific investigations as a precursor for human exploration},
  author = {Ahlf, P. and Cantwell, E. and Ostrach, L. and Pline, A.},
  year = {2000},
  url = {https://ntrs.nasa.gov/citations/20040088653},
  note = {Source identifier: 20040088653}
}