1. Mineral occurrence in soil environments;Allen,1989
2. Awoleye, O.A., 1991. Weathering and iron oxide mineralogy of Hong Kong Granite. PhD thesis, Leeds University, England.
3. Chlorites and hydroxy-interlayered vermiculite and smectite;Barnhisel,1989
4. Weathering of igneous rocks near Hong Kong;Brock;Bull. Geol. Soc. Am.,1943
5. X-ray diffraction procedures for clay mineral identification;Brown,1980