. (2011). A Pilot Study Of Some Risk Factors For Respiratory Tract Infections Among Preschool Children At Helwan. مجلة دراسات الطفولة, 14(04.2011), 0-0. doi: 10.21608/jsc.2011.62993

. "A Pilot Study Of Some Risk Factors For Respiratory Tract Infections Among Preschool Children At Helwan". مجلة دراسات الطفولة, 14, 04.2011, 2011, 0-0. doi: 10.21608/jsc.2011.62993

. (2011). 'A Pilot Study Of Some Risk Factors For Respiratory Tract Infections Among Preschool Children At Helwan', مجلة دراسات الطفولة, 14(04.2011), pp. 0-0. doi: 10.21608/jsc.2011.62993

. A Pilot Study Of Some Risk Factors For Respiratory Tract Infections Among Preschool Children At Helwan. مجلة دراسات الطفولة, 2011; 14(04.2011): 0-0. doi: 10.21608/jsc.2011.62993