"Observations of five ionization stages of iron in the solar corona", The Astrophysical Journal, 1962

"Observations of five ionization stages of iron in the solar corona", The Astrophysical Journal, 1962, - 06 JWF 3 Sub- 1 Box 9 Folder 44, Box: 9, Folder: 44. John W. Firor Papers, - 06-JWF. National Center for Atmospheric Research (NCAR) Archives. https://aspace.archives.ucar.edu/repositories/2/archival_objects/9113 Accessed December 27, 2025.