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Notes:
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Contents : The origin and epidemiology of some important plant virus diseases / J.M. Thresh. - Chemical attraction of plant-feeding insects to plants / S. Finch. - Disease in plant communities / J.J. Burdon and R.C. Shattock. - Fish from sewage / R.W. Edwards and J.N. Densem. - Cereal aphids / N. Carter...[et al]. - Host-specificity in cereal parasites in relation to their control / P.R. Scott...[et al]
Includes bibliographical references.
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