@misc{indiciaee7ca5e6103c5,
  title = {Multi-slit spectrograph and H alpha Doppler system},
  author = {Martin, S. F. and Ramsey, H. E. and Carroll, G. A. and Martin, D. C.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19750027834},
  note = {Source identifier: 19750027834}
}