1. Evidence for long-term changes in the polychlorinated biphenyl (PCB) content of UK soils;Alcock,1993
2. Production, current use and possible rates of future disposal in OECD member countries;Bletchly,1983
3. Survey of European sludge treatment and disposal practices;Bowden;Water Research Centre Report,1987
4. Sewage sludge disposal: current and future options;Bruce;Wat. Sci. Tech.,1989
5. PCB dans les boues de quelques stations d'epuration de suisse;Burgermeister,1981