Columbia subject headings:
Argentina--Commerce--Mathematical models.
Export marketing--Argentina--Mathematical models.
Export marketing--Mathematical models.
Factor proportions--Argentina--Mathematical models.
Factor proportions--Mathematical models.
International economic relations--Mathematical models.
Harvard subject headings:
Argentina--Commerce--Mathematical models.
Export marketing--Argentina--Mathematical models.
Export marketing--Mathematical models.
Factor proportions--Argentina--Mathematical models.
Factor proportions--Mathematical models.
International economic relations--Mathematical models
Princeton subject headings: