Van Dijk, J. (1995). Taking the waters: Soil and water conservation among settling Beja nomads in Eastern Sudan. ASC.
Dyfyniad Arddull ChicagoVan Dijk, Johan. Taking the Waters: Soil and Water Conservation Among Settling Beja Nomads in Eastern Sudan. Leiden: ASC, 1995.
Dyfyniad MLAVan Dijk, Johan. Taking the Waters: Soil and Water Conservation Among Settling Beja Nomads in Eastern Sudan. ASC, 1995.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.