Columbia subject headings:
Harvard subject headings:
Aesthetics, German--19th century.
Aesthetics, German--20th century.
Cassirer, Ernst, 1874-1945
Einstein, Albert, 1879-1955
Kepler, Johannes, 1571-1630.
Philosophy, German--19th century.
Philosophy, German--20th century.
Science and civilization
Warburg, Aby, 1866-1929.
Princeton subject headings:
Aesthetics, German--19th century.
Aesthetics, German--20th century.
Cassirer, Ernst, 1874-1945.
Einstein, Albert, 1879-1955.
Kepler, Johannes, 1571-1630.
Philosophy, German--19th century.
Philosophy, German--20th century.
Science and civilization.
Warburg, Aby, 1866-1929.