@misc{1162441,
  author = {H G Groth and P Wellmann},
  title = {Spectrum formation in stars with steady-state extended atmospheres:},
  year = {1970},
  month = {1970-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.SP.332},
  language = {en},
}