Columbia subject headings:
Harvard subject headings:
Ballads, English--20th century--History and criticism.
Beatles--History.
Beatles--Influence.
Beatles. Help!
Lennon, John, 1940-1980. Yesterday (1965)
McCartney, Paul--Criticism and interpretation.
McCartney, Paul. Songs.
Rock groups--England.
Rock music--20th century--History and criticism.
Princeton subject headings:
Beatles.
Lennon, John, 1940-1980. Yesterday (1965)
McCartney, Paul.