Columbia subject headings:
Harvard subject headings:
Austria--Intellectual life--19th century.
Austria--Intellectual life--20th century.
Germany--Intellectual life--19th century.
Germany--Intellectual life--20th century
Logic.
Ontology.
Philosophy.
Psychology
Thought and thinking.
Princeton subject headings:
Logic.
Ontology.
Philosophy, Austrian--19th century.
Philosophy, Austrian--20th century.
Philosophy, German--19th century.
Philosophy, German--20th century.
Psychology.