Proceedings of the 4th International Conference on Geoscience Information
Barkworth, A.
Proceedings of the 4th International Conference on Geoscience Information - 1 - 411 - Afrika - Kartenwerk - Series W: Monograph to Sheet 12 .
3-443-28315-2
Economic geography
Africa, West--Economic conditions--1960-
Proceedings of the 4th International Conference on Geoscience Information - 1 - 411 - Afrika - Kartenwerk - Series W: Monograph to Sheet 12 .
3-443-28315-2
Economic geography
Africa, West--Economic conditions--1960-