@misc{indiciae3c8b0f8ef303,
  title = {Planetary protection issues and future Mars missions},
  author = {Devincenzi, D. L. and Klein, H. P. and Bagby, J. R.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19940029027},
  note = {Source identifier: 19940029027}
}