From 1922 to 1940, the Latin script was used with the additional letters:
ç, , , , , z, , and '.
From 1940 to 1958, the additional cyrillic letters , , , and without the letter j.
In 1959, J, j replaced , .
For more information, see: Languages Identification Guide / R.S. Gilyarevsky, V.S. Grivnin. Moscow : "Nauka", 1970. (DR) P213.G4913
The divergencies from Russian transliteration are marked with .