K. Heine, Sahara and Namib/Kalahari during the late Quaternary-inter-hemispheric contrasts and comparisons, Zeitschrift fur Geomorphologie. Supplementband Zeitschrift fur Geomorphologie. Supplement;Zeitschrift fur Geomorphologie. Supplementary issue Annals of geomorphology. Supplement;Annales de geomorphologie. Supplement, 126, 2002, pp. 1-29