Columbia subject headings:
Dissenters--Ukraine--Correspondence.
Luckyj, George S. N., 1919-2001--Correspondence.
Political prisoners--Ukraine--Correspondence.
Sversti︠u︡k, I︠E︡vhen--Correspondence.
Harvard subject headings:
Dissenters--Ukraine--Correspondence.
Luckyj, George S. N., 1919-2001--Correspondence.
Political prisoners--Ukraine--Correspondence.
Sversti︠u︡k, I︠E︡vhen--Correspondence.
Princeton subject headings:
Dissenters--Ukraine--Biography--Sources.
Luckyj, George S. N., 1919-2001--Correspondence.
Sversti︠u︡k, I︠E︡vhen--Correspondence.