Sightings of harbour porpoises (Phocoena phocoena) off the island of Sylt, F.R.G.
Kremer, H.H.; Koch, L.; Baschek, B.; Adloff, B. (1992). Sightings of harbour porpoises (Phocoena phocoena) off the island of Sylt, F.R.G., in: Symoens, J.J. (Ed.) Proceedings of the symposium 'Whales: Biology-threats-conservation 1991': Brussels, 5-7 June 1991. pp. 73-75
In: Symoens, J.J. (Ed.) (1992). Proceedings of the symposium 'Whales: Biology-threats-conservation 1991': Brussels, 5-7 June 1991. Royal Academy of Overseas Sciences: Brussels. 260 pp., more
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