@misc{indiciae10eb11798df5,
  title = {High-luminosity G supergiants},
  author = {Humphreys, R. M. and Ney, E. P. and Strecker, D. W.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710052067},
  note = {Source identifier: 19710052067}
}