Wallace, L. <br/><br/>
An atlas of the sunspot umbral spectrum in the red and infrared from 8900 to 15,050 cm-1 (6642 to 11,230 A) 
L. Wallace…[et al.]                                                   
 - Tucson  National Optical Astronomy Observatories  1998 
 - [various pagings.] 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Atlas-Sunspots, Sunspots-Atlas
<br/><br/><label>Universal Decimal Class. No.: </label>084.4:523.74  / WAL