@misc{indiciaefa2216352599,
  title = {Logic-controlled solid-state switchgear for 270 volt dc.},
  author = {Waddington, D. and Buchanan, E., Jr. and Sundberg, G.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730058113},
  note = {Source identifier: 19730058113}
}