Columbia subject headings:
Kaiser, Georg, 1878-1945--Family.
Marx, Julius, 1888-1970.
Mühlfeld, Maria von, 1896-1947--Correspondence.
Harvard subject headings:
Authors' spouses--Switzerland--Correspondence.
Exiles--Switzerland--History--20th century.
Kaiser, Georg, 1878-1945--Family.
Marx, Julius, 1888-1970--Correspondence.
Mühlfeld, Maria von, 1896-1947--Correspondence.
Mühlfeld, Olivia von, 1927-
Princeton subject headings:
Dramatists, German--Biography.
Exiles--Switzerland--Biography.
Jewish women--Biography.
Kaiser, Georg, 1878-1945.
Marx, Julius, 1888-1970.
Mühlfeld, Maria von, 1896-1947--Correspondence.
Mühlfeld, Maria von, 1896-1947.
Mühlfeld, Olivia von, 1927-
Mühlfeld, Olivia von, 1927---Correspondence.