1. Effects of air pollution on plants and their interactions with other environmental factors;Bell,1987
2. Soil acidification — extent, causes and consequences;Berdén,1987
3. Fluoride accumulation in leaves due to boron containing fertilisers;Bovay;Fluoride,1969
4. Evolution and Pollution;Bradshaw,1981
5. Uptake, transport and accumulation of soil and airborne fluorides by vegetation;Davison,1983