@misc{indiciaec33822991667,
  title = {Completely modular Thermionic Reactor Ion Propulsion System (TRIPS)},
  author = {Peelgren, M. L. and Kikin, G. M. and Sawyer, C. D.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720018053},
  note = {Source identifier: 19720018053}
}