Columbia subject headings:
Lvov-Warsaw school of philosophy.
Philosophy, Polish--20th century.
Twardowski, Kazimierz, 1866-1938--Diaries.
Harvard subject headings:
Lvov-Warsaw school of philosophy.
Philosophy, Polish--20th century.
Twardowski, Kazimierz, 1866-1938--Diaries.
Princeton subject headings: