Columbia subject headings:
Arts, Modern--20th century.
Language and languages--Philosophy.
Logic, Symbolic and mathematical.
Wittgenstein, Ludwig, 1889-1951. Tractatus logico-philosophicus.
Harvard subject headings:
Arts, Modern--20th century
Language and languages--Philosophy
Logic, Symbolic and mathematical.
Wittgenstein, Ludwig, 1889-1951. Tractatus logico-philosophicus.
Princeton subject headings:
Arts, Modern--20th century.
Language and languages--Philosophy.
Logic, Symbolic and mathematical.
Wittgenstein, Ludwig, 1889-1951. Tractatus logico-philosophicus.