@misc{indiciae2af784b9e249,
  title = {Dynamics Explorer spacecraft and ground operations systems},
  author = {Hoffman, R. A. and Hogan, G. D. and Maehl, R. C.},
  year = {1981},
  url = {https://ntrs.nasa.gov/citations/19820032898},
  note = {Source identifier: 19820032898}
}