@misc{indiciae8175b0bd08e2,
  title = {First experiences with the H-maser EFOS 1},
  author = {Schlueter, W. and Nottarp, K. and Feil, D. and Busca, G.},
  year = {1983},
  url = {https://ntrs.nasa.gov/citations/19830027098},
  note = {Source identifier: 19830027098}
}