Columbia subject headings:
Energy development--Environmental aspects--Europe, Eastern--Congresses.
Energy policy--Environmental aspects--Europe, Eastern--Congresses.
Environmental policy--Europe, Eastern--Congresses.
Harvard subject headings:
Energy consumption--Environmental aspects--Europe, Central--Congresses.
Energy consumption--Environmental aspects--Europe, Eastern--Congresses.
Energy development--Environmental aspects--Europe, Central--Congresses.
Energy development--Environmental aspects--Europe, Eastern--Congresses.
Energy policy--Environmental aspects--Europe, Eastern--Congresses.
Energy policy--Europe, Central--Congresses.
Energy policy--Europe, Eastern--Congresses.
Environmental policy--Europe, Central--Congresses.
Environmental policy--Europe, Eastern--Congresses
Europe, Central--Economic conditions--Congresses.
Europe, Eastern--Economic conditions--1989---Congresses.
Princeton subject headings:
Energy consumption--Environmental aspects--Europe, Central--Congresses.
Energy consumption--Environmental aspects--Europe, Eastern--Congresses.
Energy development--Environmental aspects--Europe, Central--Congresses.
Energy development--Environmental aspects--Europe, Eastern--Congresses.
Energy policy--Europe, Central--Congresses.
Energy policy--Europe, Eastern--Congresses.
Environmental policy--Europe, Central--Congresses.
Environmental policy--Europe, Eastern--Congresses.
Europe, Central--Economic conditions--Congresses.
Europe, Eastern--Economic conditions--1989---Congresses.