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Published 1991
Full text available from U.S. Midwest Newsstream: 01/01/1992 to 03/31/1998
Electronic
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Published 2000
Full text available from Research Library: 02/12/2001 to 02/12/2001
Electronic
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Government Document
Electronic
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Published 1983
Full text available from ABI/INFORM Global: 07/01/1987 to 12/31/1999Full text available from Agricultural Science Database: 07/01/1987 to 12/31/1999
Full text available from Research Library: 07/01/1987 to 12/31/1999
Full text available from ABI/INFORM Global: 01/01/2001 to 01/31/2001
Full text available from Agricultural Science Database: 01/01/2001 to 01/31/2001
Full text available from Research Library: 01/01/2001 to 01/31/2001
Electronic
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