International conferences on the protection of the North Sea Ministerial Declarations: Bremen, Germany, 1984. London, United Kingdom, 1987. The Hague, The Netherlands, 1990
(1995). International conferences on the protection of the North Sea Ministerial Declarations: Bremen, Germany, 1984. London, United Kingdom, 1987. The Hague, The Netherlands, 1990. Ministry of the Environment and Energy. Danish Environmental Protection Agency: Copenhagen. ISBN 87-7810-362-2. 129 pp.
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