Columbia subject headings:
Europe, Central--Emigration and immigration--History.
Europe, Eastern--Emigration and immigration--History.
Forced migration--Europe, Central--History.
Land use--Europe, Central--History.
Harvard subject headings:
Europe, Central--Emigration and immigration--History--Congresses.
Europe, Eastern--Emigration and immigration--History--Congresses.
Land use--Europe, Central--History--Congresses.
Land use--Europe, Eastern--History--Congresses.
Landscapes--Europe, Central--History--Congresses.
Landscapes--Europe, Eastern--History--Congresses.
Princeton subject headings:
Europe, Central--Emigration and immigration--History--Congresses.
Europe, Eastern--Emigration and immigration--History--Congresses.
Land use--Europe, Central--History--Congresses.
Land use--Europe, Eastern--History--Congresses.
Landscapes--Europe, Central--History--Congresses.
Landscapes--Europe, Eastern--History--Congresses.