Townend, C. B. (1959). The economics of the disposal of sewage and trade effluents.
शिकागो स्टाइल उद्धरणTownend, C. B. The Economics of the Disposal of Sewage and Trade Effluents. 1959.
एमएलए उद्धरणTownend, C. B. The Economics of the Disposal of Sewage and Trade Effluents. 1959.
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