Columbia subject headings:
Agricultural industries--Law and legislation--Ecuador.
Petroleum law and legislation--Ecuador.
Planning--Law and legislation--Ecuador.
Harvard subject headings:
Agricultural industries--Law and legislation--Ecuador.
Petroleum law and legislation--Ecuador.
Planning--Law and legislation--Ecuador.
Princeton subject headings:
Agricultural industries--Law and legislation--Ecuador.
Petroleum law and legislation--Ecuador.
Planning--Law and legislation--Ecuador.