Biblio

C. D. Clark, Russell, C. S., Vaughan, W. J., Rodriguez, D. J., and Darling, A. H., Investing in water quality : measuring benefits, costs and risks. Washington, DC, USA: Inter-American Development Bank, 2001, p. xii, 333 p. : fig., tabs.

R. T. Raab, Swanson, B. E., Wentling, T. L., and Clark, C. D., Improving training quality : a trainers' guide to evaluation, [Rev. ed.]. Rome, Italy: Food and Agriculture Organization (FAO), 1991, p. vii, 157 p.: fig.