Columbia subject headings:
Harvard subject headings:
Energy development--Congresses
Energy development--Europe--Congresses.
Energy policy--Congresses
Energy policy--Europe--Congresses.
Populism--Congresses.
Populism--Europe--Congresses.
Princeton subject headings:
Energy development--Congresses.
Energy development--Europe--Congresses.
Energy policy--Congresses.
Energy policy--Europe--Congresses.
Populism--Congresses.
Populism--Europe--Congresses.