- Wittgenstein, Ludwig, 1889-1951--adresses, essays, lectures (4)
- Logic--History--20th century (1)
- Mathematics--Philosophy (1)
- Mathematics--Philosophy--History--20th century (1)
- Philosophy and science--History--20th century (1)
- Philosophy, British--History--20th century (1)
- Science--Philosophy--History--20th century (1)
- Wittgenstein, Ludwig, 1889-1951 (1)
- Wittgenstein, Ludwig, 1899-1951--adresses, essays, lectures (1)
- (3)