Columbia subject headings:
Harvard subject headings:
Germany--Emigration and immigration--Congresses.
Immigrants--Germany--Congresses.
Police--Germany--Congresses.
Police--Social aspects--Europe--Congresses.
Social integration--Germany--Congresses.
Princeton subject headings:
Emigration and immigration--Government policy--Congresses.
Emigration and immigration--Social aspects--Congresses.
Police-community relations--Congresses.
Racial profiling in law enforcement--Congresses.