Hinsch Mikkelsen and Roger Langohr, J. (1997) “Comparison of International, National and Farmers’ Classification Systems, Applied to Soils of the Western Dagomba District (Northern Ghana)”, Geografisk Tidsskrift, 97. Tilgængelig hos: https://tidsskrift.dk/geografisktidsskrift/article/view/42088 (Set: 3 maj 2024).