Wallace, L <br/><br/>
An Atlas of a dark sunspot unbral spectrum 
L. Wallace and W. Livingston 
 - Aura  The National Optical Astronomy  2003 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Atlas<br/>corona<br/>Sunsopt
<br/><br/><label>Universal Decimal Class. No.: </label>523.982(084.4)  / WAL