@misc{indiciaee6965146a2cc,
  title = {GSFC orbit computations for ISAGEX operations},
  author = {Agreen, R. W. and Marsh, J. G. and Murphy, J. P. and Sandson, M. L.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720018210},
  note = {Source identifier: 19720018210}
}