Wallace, L <br/><br/>
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 m) 
L. Wallace, K. Hinkle and W. C. Livingston 
 -  National Solar Observatory 
 - [various pagings.] 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sunspot<br/>Umbral spectra
<br/><br/><label>Universal Decimal Class. No.: </label>084.4:523.982.2  / WAL