Viesssman, W., & Welty, C. (1985). Water management: Technology and institutions. Harper.
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Dyfyniad Arddull Chicago
Viesssman, Warren, and Clare Welty. Water Management: Technology and Institutions. Cambrdge: Harper, 1985.
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Dyfyniad MLA
Viesssman, Warren, and Clare Welty. Water Management: Technology and Institutions. Harper, 1985.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.