Kharadze, E. K.   1907-2001 <br/><br/>
The Peculiar Stars and Spectral Classification /  
[by] E. K. Kharadze, R. A. Bartaya. 
 - Dordrecht ;   Boston,   1973. 
<br/><br/> Reprint: International Astronomical Union : symposium no. 50 : Spectral classification  and multicolour photometry, Dordrecht, Boston, 1973, pp. 91-94. 
<br/><br/><label>Universal Decimal Class. No.: </label>523