Columbia subject headings:
Authors, Kashubian--20th century--Correspondence.
Historians--Poland--Correspondence.
Labuda, Gerard--Correspondence.
Lexicographers--Poland--Kaszuby--Correspondence.
Sychta, Bernard--Correspondence.
Harvard subject headings:
Authors, Kashubian--20th century--Correspondence.
Lexicographers--Poland--Kaszuby--Correspondence.
Sychta, Bernard--Correspondence.
Princeton subject headings: