Columbia subject headings:
Harvard subject headings:
Archives--Poland
Poland--Politics and government--1945-1980--Sources.
Poland--Social conditions--1945---Sources.
Suchodolski, Witold--Correspondence.
Wąsowicz, Michał--Correspondence.
Princeton subject headings:
Archives--Poland.
Suchodolski, Witold,--Correspondence.
Wąsowicz, Michał,--Correspondence.