Citation
Baillie, S.R., Furness, R.W., Clark, J.A., Green, R.E., Gosler, A.G., Ormerod, S.J., Peach, W.J., Stroud, D.A., Sutherland, W.J. & Wilson, J.D. 1999. The scientific strategy of the BTO Ringing Scheme. Ringing & Migration 19: 143.