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2
-
Soils of Mauritania, Mali, Upper Volta, Niger and Chad : [covering the published literature for 1940-1975] / comp. by Commonwealth bureau of soils.
- 862.21
- Commonwealth Agricultural Bureaux,
- 1977.
- Slough :
-
Wind erosion and its control (1968-1977) / Commonwealth agricultural bureaux.
- Commonwealth Agricultural Bureaux,
- 1978.
- Slough :