Download or read book Sunspot Umbral Spectra in the Regions 1925 to 2226 and 2392 to 3480 Cm 1 2 87 to 4 18 and 4 48 to 5 35 mu M written by Lloyd Wallace and published by . This book was released on 2002 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: