McKellar, A. <br/><br/>
The Dominion Astrophysical Observatory, Victoria, B.C. :  the Chromospheric K-Line of CA II in the spectrum of 31 Cygni / 
A. McKellar ; L. H. Aller, G. J. Odgers and E. H. Rivhardson. 
 - Ottawa :  The Queen's Printer and Controller of Stationary,  1959. 
 - 58 p. ;  29 cm. 
<br/><br/><label>Subjects--Corporate Names: </label><br/>Dominion Astrophysical Observatory.
<br/><br/><label>LC Class. No.: </label>SPE-B 06107