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出版 1987
Full text available from ABI/INFORM Trade & Industry: 01/05/1998 to 05/18/2003Full text available from Advanced Technologies & Aerospace Database: 01/05/1998 to 05/18/2003
Full text available from Computer Science Database: 01/05/1998 to 05/18/2003
Full text available from ABI/INFORM Trade & Industry: 11/03/2003 to 09/29/2008
Full text available from Advanced Technologies & Aerospace Database: 11/03/2003 to 09/29/2008
Full text available from Computer Science Database: 11/03/2003 to 09/29/2008
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