@misc{indiciae91a31985e2cc,
  title = {Synthesis of an evolutionary lunar exploration plan.},
  author = {Mclaughlin, J. F. and Paul, D., 3rd and Shapland, D. J.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19670064259},
  note = {Source identifier: 19670064259}
}