عناصر مشابهة

• Detection of heavy metal residues of eggs and egg products
  بواسطة: Ibrahim, Mohamed Al Sayed Abd Alfattah منشور: (2002)
• Some studies on mycoplasma infection in ducks
  بواسطة: Lebdah, Mohamed Abd Alaziz Al Sayed منشور: (1984)
• Some Genetical and Physiological Studies On Growth Retardation In Ducks
  بواسطة: El Sayiad, Gharib Ahmed منشور: (1983)
• Egg Production in Relation to System of Housing And Rearing
  بواسطة: Tantawy, Ibrahim Abd Allah Kalil منشور: (1994)
• Environmental and Genetic Aspects of Some Productive Traits In Ducks
  بواسطة: El Maghawry, Ahmed Magdy Mohamed منشور: (1983)