Columbia subject headings:
Ibsen, Henrik, 1828-1906.
Ibsen, Sigurd, 1859-1930.
Ibsen, Suzannah, 1836-1914.
Harvard subject headings:
Ibsen, Henrik, 1828-1906.
Ibsen, Sigurd, 1859-1930.
Ibsen, Suzannah Daae (Thoresen) 1836-1914.
Princeton subject headings:
Ibsen, Henrik, 1828-1906.
Ibsen, Sigurd, 1859-1930.
Ibsen, Suzannah, 1836-1914.