@misc{indiciae3b0bfb729bfb,
  title = {NASA NR hydrogen maser},
  author = {Rueger, L. J. and Bates, A. and Stillman, L. and Norton, J. and Blackburn, C. M. and Reinhardt, V. A.},
  year = {1978},
  url = {https://ntrs.nasa.gov/citations/19790058250},
  note = {Source identifier: 19790058250}
}