TY  - BOOK
AU  - Barkworth,A.
TI  - Proceedings of the 4th International Conference on Geoscience Information
T2  - Afrika - Kartenwerk - Series W: Monograph to Sheet 12
SN  - 3-443-28315-2
PY  - 1994///
CY  - Ottawa
PB  - Geological Survey of Canada
KW  - Economic geography
KW  - Africa, West
KW  - Economic conditions
KW  - 1960-
ER  -