Columbia subject headings:
Harvard subject headings:
Biodiversity conservation--Germany--Congresses.
Biodiversity--Germany--Congresses.
Conservation of natural resources--Germany--Congresses.
Environmental economics--Germany--Congresses.
Environmental policy--Germany--Congresses
Natural resources--Germany--Management--Congresses.
Sustainable development--Germany--Congresses.
Princeton subject headings:
Biodiversity conservation--Germany--Congresses.
Biodiversity--Germany--Congresses.
Conservation of natural resources--Germany--Congresses.
Environmental economics--Germany--Congresses.
Environmental policy--Germany--Congresses.
Natural resources--Germany--Management--Congresses.
Sustainable development--Germany--Congresses.