Columbia subject headings:
Caruso, Enrico, 1873-1921--Friends and associates.
Caruso, Enrico, 1873-1921.
Opera--19th century.
Opera--20th century.
Tenors (Singers)--Biography.
Harvard subject headings:
Caruso, Enrico, 1873-1921
Caruso, Enrico, 1873-1921--Friends and associates.
Opera--19th century
Opera--20th century
Tenors (Singers)--Biography
Princeton subject headings:
Caruso, Enrico, 1873-1921--Friends and associates.
Caruso, Enrico, 1873-1921.
Opera--19th century.
Opera--20th century.
Tenors (Singers)--Biography.