1. AMC 2001 http://www.rsc.org/images/brief5_tcm18-25947.pdf
2. AMC 2002 http:// www.rsc.org/images/brief9_tcm18-25951.pdf
3. A study of the analytical variation of sampling and analysis of stream-sediments from areas contaminated by mining and milling;Brandvold;Journal of Geochemical Exploration,1998
4. Geological Society of London Special Publication;Coats,1995