National Biodiversity Data Centre:
European Seabirds at Sea (ESAS) bird sightings from 1980 to 2003., 2011-12-01.
Accessed via http://www.gbif.org/dataset/f8fa5f92-81cf-4b2b-8e20-e0701ca46d31 on 2014-04-24
Copyright 2013, National Biodiversity Data Centre, Waterford, Ireland. The information is free to use by individuals provided the owners of the data are acknowledged in any use of publication, or that the use of the data is cited in the following format - 'Data from the European Seabirds at Sea (ESAS) bird sightings from 1980 to 2003. dataset held by the National Biodiversity Data Centre www.biodiversityireland.ie, [insert date]'