Cramer, M. D.; von Holdt, J.; Khomo, L.; Midgley, J. J. Evidence for Aeolian Origins of Heuweltjies from Buried Gravel Layers. S. Afr. J. Sci. 2016, 112 (1/2), 10. https://doi.org/10.17159/sajs.2016/20150025.