Columbia subject headings:
Brel, Jacques.
Ferré, Léo.
Harvard subject headings:
Brel, Jacques--Criticism and interpretation.
Ferré, Léo--Criticism and interpretation.
Popular music--France--History and criticism
Princeton subject headings:
Brel, Jacques--Criticism and interpretation.
Ferré, Léo--Criticism and interpretation.
Popular music--France--History and criticism.