1. Adriano DC (2001) Trace elements in terrestrial environments: biogeochemistry, bioavailability and risks of metals. Springer, New York
2. Akbar KF, Hale WHG, Headley AD, Athar M (2006) Heavy metal contamination of roadside soils of Northern England. Soil Water Res 1:158–163
3. Allard B (1995) Groundwater. In: Salbu B, Steinnes E (eds) Trace elements in natural waters. CRC Press, Boca Raton, pp 151–176
4. Alloway B (ed) (1990) Heavy metals in soils. Blackie/Wiley, Glasgow/London/York
5. Alloway BJ (2004) Contamination of soils in domestic gardens and allotments: a brief overview. Land Contam Reclam 12:179–187