TY - BOOK AU - Withagen Cees TI - Economic theory and international trade in natural T2 - Lecture Notes in Economics and Mathematical Systems. 253 SN - 3540159703 U1 - X:54:(B), M5 PY - 1985/// CY - Berlin PB - Springer-Verlag KW - Australia N1 - Bibliography: P 166-172 ER -