Alluvial Terraces of the Lower Vaal River, South Africa: A Reappraisal and Reinvestigation

Butzer, Karl W. ; Helgren, David M. ; Fock, G. J. ; Stuckenrath, Robert, Jr. (1973). Alluvial Terraces of the Lower Vaal River, South Africa: A Reappraisal and Reinvestigation . The Journal of geology, 81 (3) , 341-362.