Columbia subject headings:
Biodiversity conservation--Law and legislation--Congresses.
Biodiversity conservation--Moral and ethical aspects--Congresses.
Plant conservation--Law and legislation--Congresses.
Plant conservation--Moral and ethical aspects--Congresses.
Harvard subject headings:
Biodiversity conservation--Law and legislation
Biodiversity conservation--Law and legislation--Congresses.
Biodiversity conservation--Moral and ethical aspects--Congresses.
Bioethics--Law and legislation--Congresses.
Bioethics--Law and legislation.
Endangered plants--Law and legislation--Congresses.
Endangered plants--Law and legislation.
Endangered species--Law and legislation
Endangered species--Law and legislation--Congresses.
Princeton subject headings: