1. Pesticide usage in Great Britain 1984-85 crop year;Brit. Agrochemicals Ass. Ann. Rep. and Handbook,1986
2. The use of fungicides and insecticides on cereals;Ministry of Agriculture, Fisheries and Food Booklet,1986
3. Pesticide usage in Great Britain 1989-1990 crop year;Brit. Agrochemicals Ass. Ann. Rep. and Handbook,1991
4. Aebischer, N. J. ; Potts, G. R. , 1990: Long-term changes in numbers of cereal invertebrates assessed by monitoring. Brighton Crop protec. Conf. - Pests and Diseases. 163-172.
5. Pitfall trap catches of the carabid beetle Pterostichus melanarius, in relation to gut content and prey densities in insecticide treated and untreated spring barley;Chiverton;Ent. Exp. App.,1984