- S. Farooq, A.K. Al-Yousef,
"Design, Operation and Monitoring of Slow Sand Filters as
Tertiary Treatment", Saudi Arabian Section, First Regional
Conference and Exhibition, Manama, Bahrain, Sept.18-20 (1994).
- S. Farooq, A.K. Al-Yousef,
"Effectiveness of Slow Sand Filters in Removal of
Micro-organisms From Secondary Effluent", The Fourth Saudi
Engineering Conference, Jeddah, Saudi Arabia, Nov. 1995
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