Environmental protection technology series. 660/2-74-057. Soil modification for denitrification and phosphate reduction of feedlot waste [with list of references); by A. E. Erickson, B. G. Ellis, J. M. Tiedje, A. R. Wolcott, C. M. Hansen, F. R. Peabody, E. C. Miller, J. W. Thomas.

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