@misc{1190996,
  author = {W O Roberts and A H Shapley},
  title = {Observations of the solar corona at climax, 1944-46:},
  year = {1948},
  month = {1948-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.CRPL.1-4},
  language = {en},
}