Columbia subject headings:
Music--Russia--19th century--History and criticism.
Music--Russia--20th century--History and criticism.
Harvard subject headings:
Music--Russia--19th century--History and criticism
Music--Russia--20th century--History and criticism.
Princeton subject headings:
Music--Russia--19th century--History and criticism.
Music--Russia--20th century--History and criticism.
Opera--Russia--19th century.
Opera--Russia--20th century.