00663nam a2200193Ia 4500 IN-BaIIA 211028s9999 xx 000 0 eng d IIA Library 084.4:523.74 WAL Wallace, L. 17424 An atlas of sunspot umbral spectra in the visible from 15000 to 25500cm-1 (3920 to 6664 A) L. Wallace, K. Hinkle and W. Livingston Tucson National Solar Observatory 2000 NSO technical report; no. 1 Atlas Sunspots Hinkle, K. 23546 Livingston, W. 17422 BK 13431 13431 0 0 0 0 BAN BAN GEN 0000-00-00 0 084.4:523.74/ WAL 14350 2021-11-05 0000-00-00 BK