Author: Grenewitz, R. Language: English Type: article Pagination: 57 Series: Vol. 4 Source: IDS Bulletin Date of publication: 1974 Place of publication: Publisher: Notes: Resumé
Author: Ivanov-Razumnik , R.V. Language: Russian Type: book Pagination: 57 Series: Source: Date of publication: 1918 Place of publication: Prague Publisher: Notes: Ch. VI