"A study of a solar active region using combined optical and radio techiniques", [u]Extrait des Annales d'Astrophysique[/u], 1960

"A study of a solar active region using combined optical and radio techiniques", [u]Extrait des Annales d'Astrophysique[/u], 1960, - 06 JWF 3 Sub- 1 Box 9 Folder 58, Box: 9, Folder: 58. John W. Firor Papers, - 06-JWF. National Center for Atmospheric Research (NCAR) Archives. https://aspace.archives.ucar.edu/repositories/2/archival_objects/9127 Accessed December 27, 2025.