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no DOI — not checkedDistrict Census Hand Book, (1981-1991-2001). Maharashtra, India.
no DOI — not checkedGeorgiou,S.and Bateman, I. (2000). Contingent Ranking and Valuation of River Water Quality Improvement, CSERGE working Paper, Birmingham, 12–20.
no DOI — not checkedMarkandeya, A. and Murty, M.N. (2000). A Cost-Benefit Analysis of the Gaga Action Plan: Cleaning-up the Ganges, Oxford University Press, New Delhi, 116–137.
no DOI — not checkedMourato, S. (1997), Estimating the value of water quality improvement in Lake Balaton: a contingent valuation study, Report to DEXII, European Commission, Brussels, 22–23.
no DOI — not checkedNagarkar, S. (1997). A Survey of the Water Quality of Mula, Mutha and Pavana, School of Health Sciences, University of Pune, India, 3.
no DOI — not checkedSoderquist,T. (2000). The regional willingness to pay for a reduced eutrophication in the Stockholm archipelago, Beijer, Sweden, 6–17.
no DOI — not checkedSoutukorva, A. (2001). The value of improved water quality: A random utility model of recreation in the Stockholm Archipelago, Beijer, Sweden, 1–4.
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