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- [20] CHANGES IN THE CHEMICAL CONTROL OF YELLOW NUTSEDGE (CYPERUS-ESCULENTUS L) IN MAIZE COMMUNICATIONS OF THE FACULTY OF AGRICULTURAL SCIENCES OF THE STATE UNIVERSITY OF GHENT, VOL 53, PTS 2A, 2B, 3A, 3B: 1988 INTERNATIONAL SYMPOSIUM ON CROP PROTECTION, 1988, 40 : 1241 - 1249