48 
insufficient knowledge and experience. There is even the high risk that erroneous conclusions 
are drawn. 
REFERENCES: 
Dahlmann, G.: Eine neue sichere Methode zur Identifizierung der Verursacher von 
Ölverschmutzungen (Dt. hydrogr. Z. 37(5), 1984, 217-220) 
Dahlmann, G: Identification of oil pollution. In: Seminar on Oil Pollution Questions, 
Norrköping, (Baltic Sea Environment Proceedings No. 22, Baltic Marine Environment 
Protection Commission - Helsinki Commission, 1987, 149-160) 
Dahlmann G., Timm D., Averbeck Chr., Camphuysen C., Skov H., Durinck J.: Oiled 
Seabirds- Comparative Investigations on Oiled Seabirds and Oiled Beaches in the 
Netherlands, Denmark and Germany (1990-93)(Mar. Poll. Bull., Vol. 28, No. 5, 305- 
310, 1994) 
Dahlmann, G. Müller-Navarra, S.: The Source of Oil Pollution on the East Frisian islands in 
October 1989 - an Exemplary case (Dt. Hydrogr. Z. 49, 35-43, 1997 
Author: Dr. Gerhard Dahlmann 
Bundesamt für Seeschifffahrt und Hydrographie, 
Hamburg and Rostock 
Tel: +49/40/3190-3352 
e-mail: gerhard.dahlmann@bsh.de