editors, John Ragland and Rattan Lal ; organizing committee, John Ragland (1990), Uzo Mokwunye (1991) ; editorial committee, Kenneth Cassman ... [et al.] ; editor[s] in chief, Gary A. Peterson, P.S. Baenziger, Robert J. LuxmooreAmerican Society of Agronomy : Crop Science Society of America : Soil Science Society of America1993
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- 著者標目Ragland, John Lal, R. American Society of A...