Columbia subject headings:
Harvard subject headings:
Foreign exchange--Scandinavia--Mathematical models.
Petroleum products--Prices--Scandinavia--Mathematical models.
Scandinavia--Foreign economic relations--Mathematical models.
Wages--Scandinavia--Mathematical models.
Princeton subject headings:
Foreign exchange--Scandinavia--Mathematical models.
Petroleum products--Prices--Scandinavia--Mathematical models.
Scandinavia--Foreign economic relations--Mathematical models.
Wages--Scandinavia--Mathematical models.