Подобни библ. документи

• Agriculture and the nitrogen cycle : Assessing the impact of fertilizer use on food production and the environment /
  Публикувано: (2004)
• Problems of ecological security in agriculture /
• The web of life : a first book of ecology /
  от: Storer, John H. 1888-
  Публикувано: (1956)
• Agricultural ecology : An analysis of world food production systems /
  от: Cox, George W.
  Публикувано: (1979)
• Overcoming agricultural pollution of water : The challenge of integrating agricultural and environmental policies of the European Union /
  от: Scheierling, Susanne M.
  Публикувано: (1995)