@misc{indiciaefe6044c4c62f,
  title = {Space Elevators: Building a Permanent Bridge for Space Exploration and Economic Development},
  author = {Smitherman, David V., Jr. and Howell, Joe T.},
  year = {2000},
  url = {https://ntrs.nasa.gov/citations/20000105202},
  note = {Source identifier: 20000105202}
}