Supplement for Africa :

Antzeko izenburuak

• Assessment and collection of data on post-harvest foodgrain losses /
  Argitaratua: (1980)
• Agricultural revolution in Africa? : impediments to change and implications for farming, for education and for society /
  nork: Lowe, R. G.
  Argitaratua: (1986)
• Estimation of crop areas and yields in agricultural statistics /
  Argitaratua: (1982)
• The Soil resources of tropical Africa a symposium of the African Studies Association of the United Kingdom
  Argitaratua: (1968)
• Crop loss assessment methods. Supplement 3 /
  Argitaratua: (1981)