@misc{indiciaef0b0b81f6d9f,
  title = {Radiation exposure for manned Mars surface missions},
  author = {Simonsen, Lisa C. and Nealy, John E. and Townsend, Lawrence W. and Wilson, John W.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19900009041},
  note = {Source identifier: 19900009041}
}