Biblio

S. - Y. Kwak, Yoo, S. - H., and Kim, C., “Measuring the willingness to pay for tap water quality improvements : results of a contingent valuation survey in Pusan”, Water, pp. p. 1638 - 1652; 5 tab., 2013.

R. Ramasubban, Singh, B., Bhatia, R., Griffin, C. C., Kim, C., and Briscoe, J., “Willingness to pay for water in Kerala, India”. Centre for Social and Technological Change, Bombay, India, p. vii, 65 p.: 18 fig., 24 tab., 1991.