Columbia subject headings:
Alexander, Christopher, 1936-
Architecture--Philosophy.
Ruskin, John, 1819-1900.
Semper, Gottfried, 1803-1879.
Harvard subject headings:
Alexander, Christopher, 1936-.
Architecture--Philosophy
Ruskin, John, 1819-1900
Semper, Gottfried, 1803-1879.
Princeton subject headings:
Alexander, Christopher, 1936-
Architecture--Philosophy.
Ruskin, John, 1819-1900.
Semper, Gottfried, 1803-1879.