ebrary, Inc. (1997). Valuing ground water: Economic concepts and approaches. National Academy Press.
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Chicago Style (17th ed.) Zitazioa
ebrary, Inc. Valuing Ground Water: Economic Concepts and Approaches. Washington, D.C.: National Academy Press, 1997.
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MLA (9th ed.) Zitazioa
ebrary, Inc. Valuing Ground Water: Economic Concepts and Approaches. National Academy Press, 1997.
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Kontuz: berrikusi erreferentzia hauek erabili aurretik.