@misc{indiciaee2e6602c24ad,
  title = {Tracking and data systems support for the Helios project. Volume 1: Project development through end of mission, phase 2},
  author = {Goodwin, P. S. and Traxler, M. R. and Meeks, W. G. and Flanagan, F. M.},
  year = {1976},
  url = {https://ntrs.nasa.gov/citations/19760019169},
  note = {Source identifier: 19760019169}
}