Seabirds in the North Sea: final report of phase 2 of the Nature Conservancy Council Seabirds at Sea Project, November 1983-October 1986
Tasker, M.L.; Webb, A.; Hall, A.J.; Pienkowski, M.W.; Langslow, D.R. (1987). Seabirds in the North Sea: final report of phase 2 of the Nature Conservancy Council Seabirds at Sea Project, November 1983-October 1986. Nature Conservancy Council: Peterborough. ISBN 0-86139-394-5. 336 pp.
Research Institute for Nature and Forest (INBO). European Seabirds at Sea - data collected by the Research Institute for Nature and Forest (INBO). INBO Seabird distribution data (all trips)., more
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