Biblio

J. N. Kardile, Simple methods in water purification. Nasik, India: Foundation for Simplified Filters, 1987, p. 179 p.: fig., tab.

J. N. Kardile, “Development of simple and economic filtration methods for rural water supplies”. Nagpur University, Nagpur, India, p. iv, 228 p.: techn. drwngs, fig., photogr., tab., 1978.