Diplomatic Conference on the Protection of the Marine Environment of the Baltic Sea Area, Helsinki, Finland, 9 April 1992. Conference document no. 5/3, agenda item 5.
karttoja
Lisäpainokset: 2. ed. 1992.
Lisäpainokset: 2.-3. uppl. 1992.
Lisäpainokset: 3rd ed. 1992.
Organized by Conference Secreteriat, Helsinki Commission, in cooperation with Ministry for Foreign Affairs of Finland and Ministry of the Environment of Finland.