Aquatic Weeds : Their Menace and Control a textbook and manual

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• Aquatic weeds: their menace and control
  Autor: Gupta, O P
  Vydáno: (1979)
• Aquatic weeds: their menace and control: a text book and manual
  Autor: Gupta, O P
  Vydáno: (1979)
• Aquatic weeds: their menace and control/
  Autor: Gupta, O. P.
  Vydáno: (1979)
• Aquatic weeds :their menace and control
  Autor: Gupta, O P
  Vydáno: (1985)
• Aquatic weed management: A textbook and manual
  Autor: Gupta, O P
  Vydáno: (1987)