1. Gravity Filtration of Algal Suspensions;Andrews,1968
2. Standard Methods for the Examination of Water and Waste Water;APHA,1976
3. Sand filtration of algal suspensions;Borchardt;J. Am. Wat. Wks Ass.,1961
4. Theory of water filtration;Camp;J. sanit. Engng Div. Am. Soc. civ. Engrs,1964
5. Sand filtration of particulate matter;Davis;J. sanit. Engng Div. Am. Soc. civ. Engrs,1966