Columbia subject headings:
Oehler, Klaus.
Philosophers--Germany--Biography.
Philosophy, German--20th century.
Philosophy, Modern.
Harvard subject headings:
Oehler, Klaus.
Philosophers--Germany--Biography
Philosophy, German--20th century.
Princeton subject headings:
Oehler, Klaus.
Philosophers--Germany--Biography.
Philosophy, German--20th century.
Philosophy, Modern.