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R639                Proceedings of a symposium on aquatic herbicides, 5th - 7th January 1976 held at St. Hilda's College, Oxford, England / edited by T. O. Robson & J. H. Fearon . - [S.l.] : The British Crop Protection Council,1976 . - vii,115p. . - Monograph; no.16 .

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