Columbia subject headings:
Description (Philosophy)
Frege, Gottlob, 1848-1925.
Logic.
Russell, Bertrand, 1872-1970.
Semantics (Philosophy)
Wittgenstein, Ludwig, 1889-1951.
Harvard subject headings:
Description (Philosophy)
Frege, Gottlob, 1848-1925.
Logic
Russell, Bertrand, 1872-1970
Semantics (Philosophy)
Wittgenstein, Ludwig, 1889-1951
Princeton subject headings:
Description (Philosophy)
Frege, Gottlob, 1848-1925.
Logic.
Russell, Bertrand, 1872-1970.
Semantics (Philosophy)
Wittgenstein, Ludwig, 1889-1951.