Utilisation of space by grey and harbour seals in the Pentland Firth and Orkney waters /
Natural Environment Research Council (Great Britain).Sea Mammal Research Unit,author.
Scottish Natural Heritage (Agency)
Includes bibliographical references (page 50).
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Description from online resource; title from PDF title page (Scottish Natural Heritage, viewed 7 July 2020)
Harbor seal
Harbor seal
Gray seal
Gray seal