Columbia subject headings:
Slavic languages--Textbooks--History and criticism.
Slavic languages--Verb.
Harvard subject headings:
Church Slavic language--Grammar--Textbooks--History.
Church Slavic language--Verb--Study and teaching--History.
Slavic languages, Eastern--Grammar--Textbooks--History.
Slavic languages, Eastern--Verb--Study and teaching--History.
Princeton subject headings: