1. Heavy metal content of some rivers and lakes in Wales;Abdullah;Nature, Lond.,1972
2. Lower Swansea Valley—Legacy and future;Anon,1982
3. Water quality, Section 3.1;Bird,1983
4. The effect of hydrological factors on past and present river pollution problems in South Wales;Bird,1985
5. Flood effects on the transport of heavy metals;Bradley;Int. J. of Environ. Studies,1984