1. Barrow CJ. Environmental Management: Principles and Practise. London: Routledge; 2000
2. Zapata F. The use of environmental radionuclides as tracers in soil erosion and sedimentation investigations: Recent advances and future developments. Soil & Tillage Research. 2003;69:3-13
3. Walling DE. The changing sediment loads of the world’s rivers. In: Sediment Dynamics in Changing Environments. International Association of Hydrological Sciences (IAHS), Publication No. 325. 2008. p. 323-338
4. Walling DE, Quine TA. The use of caesium-137 measurements in soil erosion surveys. In: Erosion and Sediment Transport Monitoring Programmes in River Basins. International Association of Hydrological Sciences (IAHS), Publication No. 210. 1992. p. 143-152
5. El-Swaify SA, Flach KW. Foreword. In: Lal R, editor. Soil Erosion Research Methods. Iowa: USA: Soil and Water Conservation Society; 1988