TY  - BOOK
AU  - Ashraf Abd El-Hamled Khedr ,
AU  - Ibrahem Helal El-Hattab
AU  - . Mohamed Reda Haggag
TI  - To Evaluate The Efficiency Of Household Water Sand Filters Implemented In Upper Egypt / 
PY  - 1995///
KW  - To Evaluate The Efficiency Of Household Water Sand Filters Implemented In Upper Egypt
N1  -  Thesis (M.Sc.)-Cairo University,1995; Bibliography: pages 113 :120
ER  -