Bull. d'analyses de la Liff.scien.Bulgare:Arts:vol.11:1968 

 - Sofia  Acad. Bulgare.....  1968 
<br/><br/><label>Subjects--Topical Terms: </label><br/>55922:N58
<br/><br/><label>Dewey Class. No.: </label>55922:N58  / 122 I8.11.2