Columbia subject headings:
Gardel, Carlos, 1890-1935.
Popular music--1921-1930.
Popular music--1931-1940.
Singers--Argentina--Biography.
Tangos.
Harvard subject headings:
Gardel, Carlos, 1890-1935--Discography.
Gardel, Carlos, 1890-1935.
Music--Argentina
Singers--Argentina--Biography
Songs, Spanish--Argentina.
Tangos
Princeton subject headings: