Baltic Sea environment proceedings: No. 16. Water balance in the Baltic Sea: No. 17a. First periodic assessment of the state of the marine environment of the Baltic Sea area, 1980–1985; No. 18. Activities of the Commission, 1985. Helsinki Commission (1986). Government Printing Centre,Helsinki 期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Baltic Sea environment proceedings: No. 16. Water balance in the Baltic Sea: No. 17a. First periodic assessment of the state of the marine environment of the Baltic Sea area, 1980–1985; No. 18. Activities of the Commission, 1985. Helsinki Commission (1986). Government Printing Centre,Helsinki

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