共 50 条
- [21] LINKAGES AND MULTIPLIER EFFECTS IN THE ECOLOGICALLY SPECIALIZED TRADE OF PRE-COLONIAL WEST-AFRICA CAHIERS D ETUDES AFRICAINES, 1980, 20 (1-2): : 135 - 148
- [22] LONG-DISTANCE TRADE-ROUTES IN CENTRAL-AFRICA JOURNAL OF AFRICAN HISTORY, 1962, 3 (03): : 375 - 390
- [25] SOCIAL AND ECONOMIC STUDY OF PRE-COLONIAL GABON CAHIERS D ETUDES AFRICAINES, 1977, 17 (2-3): : 331 - 344
- [26] THE EMERGENCE OF A LIBRARY TRADITION IN PRE-COLONIAL AND POST-COLONIAL AFRICA INTERNATIONAL LIBRARY REVIEW, 1981, 13 (01): : 65 - 72
- [27] ECONOMIC-CHANGE IN PRE-COLONIAL AFRICA - SENEGAMBIA IN ERA OF SLAVE TRADE - CURTIN,PD ECONOMIC HISTORY REVIEW, 1976, 29 (03): : 525 - 526
- [30] ECONOMIC-CHANGE IN PRE-COLONIAL AFRICA - SENEGAMBIA IN ERA OF SLAVE TRADE - CURTIN,PD INTERNATIONAL JOURNAL OF AFRICAN HISTORICAL STUDIES, 1975, 8 (04): : 724 - 726