Columbia subject headings:
Biodiversity conservation--Law and legislation--Spain.
Environmental law--Spain.
Natural areas--Law and legislation--Spain.
Natural areas--Law and legislation.
Natural resources--Law and legislation--Spain.
Natural resources--Law and legislation.
Harvard subject headings:
Biodiversity conservation--Law and legislation--Spain.
Environmental law--Spain
Natural areas--Law and legislation--Spain.
Natural areas--Law and legislation.
Natural resources--Law and legislation
Natural resources--Law and legislation--Spain.
Princeton subject headings:
Biodiversity conservation--Law and legislation--Spain.
Environmental law--Spain.
Natural areas--Law and legislation--Spain.
Natural areas--Law and legislation.
Natural resources--Law and legislation--Spain.
Natural resources--Law and legislation.