Gupta, O. P. (1985). Aquatic weeds: :their menace and control. Today printers.
シカゴスタイル引用形Gupta, O P. Aquatic Weeds: :their Menace and Control. New delhi: Today printers, 1985.
MLA引用形式Gupta, O P. Aquatic Weeds: :their Menace and Control. Today printers, 1985.
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