Type

Number of items: 4.
E
  • Environmental aspects of the usage of pesticides in developing countries. (1977) Edwards, C. A.
    • J
  • Nitrogen and leaf diseases of spring barley. (1977) Jenkyn, John
  • Pests, resistance and fertilizers. (1977) Jones, F. G. W.
    • P
  • Aphids and virus control on cereals. (1977) Plumb, Roger