Columbia subject headings:
Husserl, Edmund, 1859-1938.
Schapp, Wilhelm, 1884-1965.
Harvard subject headings:
Husserl, Edmund, 1859-1938
Schapp, Wilhelm, 1884-1965.
Princeton subject headings:
History--Philosophy.
Husserl, Edmund, 1859-1938.
Phenomenology.
Schapp, Wilhelm, 1884-1965.
Space and time.