The conservation of migratory birds in the Western Palearctic-African flyway : review on the importance of losses incurred to migratory birds during migration : report to the Commission of the European Communities on the work carried out under Contract 6617/27/89 /
Tucker, G. M.
McCulloch, M. N.
Baillie, S. R.
British Trust for Ornithology.
Tring : British Trust for Ornithology,
1990.