عناصر مشابهة

• Some studies on protozoal infections among cultured fish in Sharkia
  بواسطة: El Sayed, El Sayed Abd Elhay منشور: (1993)
• Studies On Some Factors Affecting The Health And Survival Of Eel =
  بواسطة: El Doosoky, El Sayed Abdo Abdo منشور: (2001)
• BIOLOGICAL STUDIES ON FOUR CICHLID FISHES(TILAPIA NILOTICA,TILAPIA GALILAE,TILAPIAZILLII,TILAPIA AUREA) IN LAKE MARIUT
  بواسطة: El Shazly, Abd Alrahman A. منشور: (1993)
• Studies on some Causes of Infertility in Bovines
  بواسطة: Eshra, Nasser Talat Al Sayed منشور: (1998)
• Some studies on the influence of pre and postparturient disorders on the reproductive performance in dairy cows
  بواسطة: El Sayad, Ibrahim El Meaddawey Ali منشور: (2001)