@misc{indiciaefbbe1559057a,
  title = {Problems in Radiation Shielding for Space Vehicles},
  author = {Burrell, M. O. and Downey, J. A., III and Keller, J. W. and Shelton, R. D.},
  year = {1962},
  url = {https://ntrs.nasa.gov/citations/19630006111},
  note = {Source identifier: 19630006111}
}