References
- Berry, L. & Ruxton, B. P., 1960: The Butana grass patterns. J. Soil Sci. 11:1, pp. 61–62.
- Buckham, A. F. & Cockfield, W. E., 1950: Gullies formed by the sinking of the ground. Am. J. Sci., 248, pp. 137–141.
- Charter, C. F., 1949: Bull. Agr. Congo Belge, 40, pp. 107–120.
- Cumberland, K. B., 1944: Soil erosion in N. Zealand. Wellington.
- Downes, R. G., 1949: A soil, land use & erosion survey of Victoria. Aust. Bull., 243, CSIRO. Melbourne.
- Fletcher et al., 1954: Piping. Trans. Am. Geoph. Union, 352, pp. 358–363.
- Fuller, M. L., 1922: Some unusual features in the loess of China. Geogr. Rev., 12, pp. 570–584.
- Greene, H., 1945: Classification & use of tropical soils. Proc. Soil Sci. Am., 10, pp. 392–96.
- Hallsworth et al., 1952: Studies in pedogenesis in N.S.W. J. Soil Sci., 3, pp. 103–124.
- Parker, G. G., 1963: Piping, a geomorphic agent in landform development in drylands.
- Parker, G. G. et al., 1964: Officers Cave, a pseudo karst feature in altered tuff & volcanic ash of the John Dey formation in eastern Oregon. Bull Geol Soc. Am., 75(5), pp. 393–402.
- Penck, W., 1953: Morphological analysis of landforms. (Translated by Czech & Boswell) Macmillian & Co. London.
- Rubey, W., 1928: Gullies formed in the Great Plains by sinking of the ground. Am. J. Sci., 15, pp. 417–422.
- Ruxton, B. P. & Berry, L., 1957: Weathering of granite & associated erosional features in Hong Kong. B.G.S.A., 68, pp. 1263–1292.
- Ruxton, B. P., 1958: Weathering & sub-surface erosion in granite at the Piedmont Angle Balos Sudan. Geol Mag., CXV, pp. 353–77.
- Stheeman, H. A., 1932: The Geology of S.W. Uganda. The Hague.
- Thorp, J., 1939: Geography of the soils of China. Nat. Geol Sttrv. China. Peking.
- Trendall, A. F., 1962: The formation of “Apparent Peneplains” by a process of combined laterisation and surface wash. Z.f. Geomorph., 6, pp. 1, 3–197.
- Worrall, G. A., 1959: The Butana grass patterns. J. Soil Sci., 10:1. pp. 34–53.
- Worrall, G. A. 1960: Tree patterns in the Sudan. J. Soil Sci., 11:1, pp. 63–67.