Waters differ greatly in physical and chemical quality and in content of microorganisms. The quality of the water is clearly related to the contents and types of organisms present and both of this aspect is the object of intensive study at present.
Reference:
Duuren, FR. 1967. Removal of the microorganisms from water. Part 1: Introduction, water-borne disease and the microorganisms involved. Water and Water Engineering, Part 1 (August 1967), pp 321-325
Duuren, F. (1967). Removal of the microorganisms from water. Part 1: Introduction, water-borne disease and the microorganisms involved. http://hdl.handle.net/10204/4880
Duuren, FR "Removal of the microorganisms from water. Part 1: Introduction, water-borne disease and the microorganisms involved." (1967) http://hdl.handle.net/10204/4880
Duuren F. Removal of the microorganisms from water. Part 1: Introduction, water-borne disease and the microorganisms involved. 1967; http://hdl.handle.net/10204/4880.