TY  - BOOK
AU  - El- Agraa, Ali Mohammed.
TI  - International trade
SN  - 0333464443
PY  - 1989///
CY  - Hampshire
PB  - The Macmillan Press Ltd.
KW  - Foreign trade
KW  - Mathematical models
N1  - Bibliography : p. 289-306; Originally published; London : Croom Helm, 1982, under the title The theory of international trade
ER  -