Fair, Gordon Maskew ; Geyer, John Charles; Okun, Daniel Alexander . (1966). Water and wastewater engineering. vol. 1: water supply and wastewaster removal. Vol.2: Water Purification and wastewater treatment and disposal. New York : John Wiley and Sons

Fair, Gordon Maskew; Geyer, John Charles; Okun, Daniel Alexander . Water and wastewater engineering. vol. 1: water supply and wastewaster removal. Vol.2: Water Purification and wastewater treatment and disposal. New York : John Wiley and Sons, 1966

Fair, Gordon Maskew ; Geyer, John Charles; Okun, Daniel Alexander . 1966. Water and wastewater engineering. vol. 1: water supply and wastewaster removal. Vol.2: Water Purification and wastewater treatment and disposal. John Wiley and Sons, New York