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出版 1980
Full text available from Earth, Atmospheric & Aquatic Science Database: 11/02/2003 to 11/30/2005Full text available from Engineering Database: 11/02/2003 to 11/30/2005
Full text available from Environmental Science Database: 11/02/2003 to 11/30/2005
Full text available from Military Database: 11/02/2003 to 11/30/2005
Full text available from Political Science Database: 11/02/2003 to 11/30/2005
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