Kovalev,S M <br/><br/>
Ежегодник большой советской энциклопедии:Yezhegodnik bol'shoy sovetskoy entsiklopedii/Yearbook of the Great Soviet Encyclopedia 

 -  1975 
 - 656p. 
<br/><br/><label>Dewey Class. No.: </label>300  / KOV/E