Columbia subject headings:
Harvard subject headings:
Collective memory--Congresses.
Emigration and immigration--Psychological aspects--Congresses.
Europe--Emigration and immigration--Psychological aspects--Congresses.
Immigrants--Europe--Social conditions--Congresses.
Immigrants--Social conditions--Congresses.
Social integration--Congresses.
Princeton subject headings:
Emigration and immigration--Psychological aspects.
Immigrants--Social conditions.