Biblio

J. A. Meyer, Casey, N. H., and Coetzee, C. B., “Water quality guidelines for livestock watering in Southern Africa”, Water SA, pp. p. 7-12 : 2 fig., 3 tab., 1997.

Socio-Economic Units, Kerala -Trivandrum, IN and Trivandrum, I. N. Kerala Sta, “The bacterial quality of water in selected wells in Kerala : an investigation”, vol. no. 6. Kerala Water Authority, Socio-Economic Units, Trivandrum, India, p. iii, 23 p. : tab., 1991.

T. S. Wood, “Simple assessment techniques for soil and water”. CODEL, Environment and Development Program, New York, NY, USA, p. iii, 31 p., 1981.