1. Water Review Technical Brief, vol. 6, no. 1, 1991.
2. Iodine and iodine compounds;Gottardi,1991
3. Handbook of Chlorination;White,1992
4. Ozone and chlorine inactivation of Cryptosporidium;Finch,1994
5. E. Hassinger, et al., Water Facts, Number 6, Reverse Osmosis Units, Publication no. 194019, The University of Arizona, College of Agriculture, Tucson, Arizona 85721.