@misc{indiciae6f1c21debc66,
  title = {Retrodirective transponder feasibility experiment},
  author = {Annese, J. F. and Hicks, G. R., Jr. and Klein, L. and Salwen, H. C.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19680017026},
  note = {Source identifier: 19680017026}
}