Columbia subject headings:
Ballads, English--History and criticism.
Ballads, Irish--History and criticism.
English poetry--Irish authors--History and criticism.
Folk songs, English--History and criticism.
Folk songs, Irish--History and criticism.
Harvard subject headings:
Ballads, English
Ballads, English--History and criticism.
Ballads, Irish--History and criticism.
English poetry--Irish authors--History and criticism
Folk songs, English
Folk songs, English--History and criticism.
Folk songs, Irish--History and criticism.
Princeton subject headings: