Columbia subject headings:
Harvard subject headings:
Education--Aims and objectives--Europe--Congresses.
Education--Aims and objectives--Poland--Congresses.
Education--Aims and objectives--Ukraine--Congresses
Education--Ukraine--History--20th century--Congresses.
Ethnicity--Poland--Congresses.
Ethnicity--Ukraine--Congresses.
Princeton subject headings:
Education--Poland--Congresses.
Education--Ukraine--Congresses.