Citation
Chamberlain, D.E., Fuller, R.J., Bunce, R.G., Duckworth, J.C. & Shrubb, M. 2000. Changes in the abundance of farmland birds in relation to the timing of agricultural intensification in England and Wales. Journal of Applied Ecology 37: 788. doi:10.1046/j.1365-2664.2000.00548.x