Columbia subject headings:
Commercial products--Latin America--Mathematical models--Congresses.
Commodity control--Mathematical models--Congresses.
Latin America--Economic conditions--Congresses.
Harvard subject headings:
Commercial products--Latin America--Mathematical models--Congresses.
Commodity control--Mathematical models--Congresses.
Latin America--Economic conditions--Mathematical models--Congresses.
Princeton subject headings:
Commercial products--Latin America--Mathematical models--Congresses.
Commodity control--Mathematical models--Congresses.
Latin America--Economic conditions--Mathematical models--Congresses.