Columbia subject headings:
Harvard subject headings:
Agalev (Organization)
Ecolo (Organization)
Environmentalists--Belgium--Political activity.
Environmentalists--Germany (West)--Political activity.
Grünen (Political party)
Political parties.
Princeton subject headings:
Agalev (Political party)
Ecolo (Organization)
Environmentalists--Belgium--Political activity.
Environmentalists--Germany (West)--Political activity.
Grünen (Political party)
Political parties.