@misc{indiciae9ea2e79ca250,
  title = {Report on active and planned spacecraft and experiments},
  author = {Schofield, N. J., Jr. and Littlefield, R. G. and Elsen, M. F.},
  year = {1985},
  url = {https://ntrs.nasa.gov/citations/19860003875},
  note = {Source identifier: 19860003875}
}