Columbia subject headings:
Harvard subject headings:
Intellectuals--Poland--Correspondence.
Lutosławski, Wincenty--Correspondence.
Twardowski, Kazimierz, 1866-1938--Correspondence.
Princeton subject headings:
Intellectuals--Poland--Correspondence.
Lutosławski, Wincenty--Correspondence.
Twardowski, Kazimierz, 1866-1938--Correspondence.