Columbia subject headings:
Harvard subject headings:
Authors' spouses--Switzerland--Biography.
Bernoulli, Maria, 1868-1963.
Hesse, Hermann, 1877-1962--Relations with women.
Hesse, Ninon.
Wenger, Ruth, 1897-1994.
Princeton subject headings:
Authors' spouses--20th century--Biography.
Authors, German--20th century--Biography.
Hesse, Hermann, 1877-1962--Marriage.
Hesse, Hermann, 1877-1962--Relations with women.
Hesse, Hermann, 1877-1962.