Bulletin D'analayses De...Litterature......Bulgare : Nos.50-59 :1973 

 - Sofia  Academie Bulgare Der Sci.  1973 
<br/><br/><label>Subjects--Topical Terms: </label><br/>55922:N58
<br/><br/><label>Dewey Class. No.: </label>55922:N58  / 122I8.15