1. Pain, D. J. & Pienkowski, M. W. (eds) Farming and Birds in Europe (Academic, London, 1997).
2. Siriwardena, G. M.et al. J. Appl. Ecol. 35, 23–43 (1998).
3. Potts, G. R. The Partridge: Pesticides, Predation and Conservation (Collins, London, 1986).
4. Evans, A. in Farming and Birds in Europe (eds Pain, D. J. & Peinkowski, M. W.) 351-357 (Academic, London, 1997).
5. Tyler, G. A., Green, R. E. & Casey, A. Bird Study 45, 35–50 (1998).