John R Holum. (1977). Topics and Terms in Enviornmental Problems. A Wiley-Interscience Publication.
शिकागो स्टाइल उद्धरणJohn R Holum. Topics and Terms in Enviornmental Problems. A Wiley-Interscience Publication, 1977.
एमएलए उद्धरणJohn R Holum. Topics and Terms in Enviornmental Problems. A Wiley-Interscience Publication, 1977.
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