• B7, Baltic Islands Network - A co-operation of the 7 largest islands in the Baltic Sea, Bornholm (Denmark), Gotland (Sweden), Hiiumaa (Estonia), Rügen (Germany), Saaremaa (Estonia), Åland (Finland) and Öland (Sweden).
• Baltic Sea Seven Island Co-operation Network - A network of the seven largest islands in the Baltic Sea. Their organization, projects, and information about each of the islands.
• List of Islands in the Baltic Sea - Wikipedia - A top-10 list of islands by size and population.

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