Columbia subject headings:
German language--Study and teaching--Baltic States--History.
German language--Study and teaching--Russian speakers--History.
German language--Textbooks for foreign speakers--Bibliography.
German language--Textbooks for foreign speakers--Russian--Bibliography.
Harvard subject headings:
German language--Baltic States--Textbooks--Bibliography.
German language--Russia--Textbooks--Bibliography.
German language--Study and teaching--Baltic States--History--Bibliography.
German language--Study and teaching--Baltic States--History.
German language--Study and teaching--Russia--History--Bibliography.
German language--Study and teaching--Russian speakers--History.
German language--Textbooks for foreign speakers--Bibliography.
German language--Textbooks for foreign speakers--Russian--Bibliography.
Princeton subject headings:
German language--Study and teaching--Baltic States--History.
German language--Study and teaching--Russian speakers--History.
German language--Textbooks for foreign speakers--Bibliography.
German language--Textbooks for foreign speakers--Russian--Bibliography.