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1
Full text available from ABI/INFORM Trade & Industry: 01/01/1992 to 03/31/1997
Full text available from Agricultural Science Database: 01/01/1992 to 03/31/1997
Full text available from Career & Technical Education Database: 01/01/1992 to 03/31/1997
Full text available from ABI/INFORM Global: 05/01/2007 to present
Full text available from ABI/INFORM Trade & Industry: 05/01/2007 to present
Full text available from Agricultural Science Database: 05/01/2007 to present
Full text available from Career & Technical Education Database: 05/01/2007 to present
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杂志
2
Full text available from Agricultural Science Database: 01/01/1985 to 10/31/1985
Full text available from Engineering Database: 01/01/1985 to 10/31/1985
Full text available from Environmental Science Database: 01/01/1985 to 10/31/1985
Full text available from ABI/INFORM Global: 01/01/1986 to 11/30/1998
Full text available from Agricultural Science Database: 01/01/1986 to 11/30/1998
Full text available from Engineering Database: 01/01/1986 to 11/30/1998
Full text available from Environmental Science Database: 01/01/1986 to 11/30/1998
Full text available from ABI/INFORM Global: 01/01/1999 to 07/31/2005
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3
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出版 2009
Full text available from ABI/INFORM Global: 12/01/2010 to presentFull text available from Advanced Technologies & Aerospace Database: 12/01/2010 to present
Full text available from Agricultural Science Database: 12/01/2010 to present
Full text available from East Europe, Central Europe Database: 12/01/2010 to present
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6
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Full text available from Agricultural Science Database: 01/01/2009 to 04/30/2018
Full text available from Engineering Database: 01/01/2009 to 04/30/2018
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17
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19
Full text available from Career & Technical Education Database: 06/10/2010 to 06/10/2010
Full text available from Earth, Atmospheric & Aquatic Science Database: 06/10/2010 to 06/10/2010
Full text available from Engineering Database: 06/10/2010 to 06/10/2010
Full text available from Environmental Science Database: 06/10/2010 to 06/10/2010
Full text available from Materials Science Database: 06/10/2010 to 06/10/2010
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20
Full text available from ABI/INFORM Trade & Industry: 06/01/1996 to present
Full text available from Agricultural Science Database: 06/01/1996 to present
Full text available from Career & Technical Education Database: 06/01/1996 to present
Full text available from Engineering Database: 06/01/1996 to present
Full text available from Environmental Science Database: 06/01/1996 to present
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