@misc{indiciaea139f1267bd4,
  title = {A methodology to compare policies for exploring the solar system},
  author = {Chamberlain, R. G. and Kingsland, L., Jr.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700064219},
  note = {Source identifier: 19700064219}
}