TY - GEN AU - Khaled Abd El maaboud Ahmed Ali AU - Ahmed Farid Mahmoud Hilmy , AU - Ahmed Mohamed Elkaiaty , AU - Souzan Ahmed Riad , TI - Studies on some factors affecting duck production / PY - 2005/// CY - Cairo : PB - Khaled Abd El maaboud Ahmed Ali , KW - Animal Production KW - Factors affecting duck production N1 - Thesis (PH.D.) - Cairo University - Faculty Of Agriculture - Department Of Animal Production; Issued also as CD N2 - This experimental work was carried out at El - serw research station for waterfowls animal production research institute Agriculture research center ER -