Columbia subject headings:
Folk songs, Czech--History and criticism.
Folk songs, Slovak--History and criticism.
Folk songs, Ukrainian--History and criticism.
Harvard subject headings:
Folk songs, Czech--History and criticism.
Folk songs, Slovak--History and criticism.
Folk songs, Ukrainian--History and criticism
Princeton subject headings:
Folk songs, Czech--History and criticism.
Folk songs, Slovak--History and criticism.
Folk songs, Ukrainian--History and criticism.