Monitoring harbour seal (Phoca vitulina) in the Danish Wadden Sea
Tougaard, S. (1989). Monitoring harbour seal (Phoca vitulina) in the Danish Wadden Sea. Helgol. Meeresunters. 43: 347-356
In: Helgoländer Meeresuntersuchungen. Biologische Anstalt Helgoland: Hamburg. ISSN 0174-3597, more
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