Columbia subject headings:
Alphabet--Soviet Union--History.
Cyrillic alphabet--Soviet Union--History.
Written communication--Government policy--Soviet Union--History.
Harvard subject headings:
Alphabet--History.
Cyrillic alphabet--History.
Soviet Union--Languages--Alphabet.
Written communication--Government policy--Soviet Union--History.
Princeton subject headings:
Alphabet--Soviet Union--History.
Cyrillic alphabet--Soviet Union--History.
Written communication--Soviet Union--Government policy--History.