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2by Craig D. Thomsen, William A. Williams, Marc Vayssiéres, Fremont L. Bell, Melvin GeorgeGet full text
Published 1993-11-01
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3by Walter L. Graves, William A. Williams, Charles Vaughn, Craig D. Thomsen, Milton B. JonesGet full text
Published 2001-11-01
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4by William A. Williams, Walter L. Graves, Kenneth G. Cassman, Paul R. Miller, Craig D. ThomsenGet full text
Published 1991-07-01
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