عناصر مشابهة

• studies of heavy metal pollution in poultry farms in relation to production performance
  بواسطة: Ahmed, Wail Mohamed Salah Aldien منشور: (2002)
• pollution by selected pesticides in poultry ranches with emphasis on water supply and eggs
  بواسطة: Aref, Mohamed Abd Alwhab منشور: (1985)
• Pesticides Pollution In Cows Farms
  بواسطة: Abd Almeguid, Yousry Moustafa منشور: (1996)
• Some studies on air pollution in poultry houses in relation to various systems of production
  بواسطة: Aidarous, Hassan Abd Alaziz منشور: (1978)
• study on the economic and productive efficiency in poultry farms, with special reference veterinary input
  بواسطة: Omar, Mohamed Ahmed Al Sayed منشور: (2003)