Heywood, V. H. (1976). Botanical systematics: An occassional series of monographs. Acadamic Press.
शिकागो स्टाइल उद्धरणHeywood, V H. Botanical Systematics: An Occassional Series of Monographs. London: Acadamic Press, 1976.
एमएलए उद्धरणHeywood, V H. Botanical Systematics: An Occassional Series of Monographs. Acadamic Press, 1976.
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