atlas of sunspot umbral spectra in the visible from 15,000 to 25,500 cm-1 (3920 to 6664 angstroms)
By: L. Wallace, K. Hinkle, W. Livingston.
Contributors: Hinkle, Kenneth.; Livingston, W. C. 1927-
Series: NSO technical report -- 00-01
Publisher: National Solar Observatory
Published: 2000
Place of publication: [Tucson, Ariz
Language: eng
Subjects: Spectrum -- Solar.