Columbia subject headings:
Folk songs, English--Bibliography.
Folk songs, Scots--Bibliography.
Harvard subject headings:
Ballads, English--Bibliography.
Ballads, Scots--Bibliography.
English ballads and songs--Bibliography.
Folk songs, English
Folk songs, Scots
Scottish ballads and songs--Bibliography.
Princeton subject headings:
Ballads, English--Bibliography.
Ballads, Scots--Bibliography.