أرسل هذا في رسالة قصيرة: Using Macro-invertebrates as Bio-indicator for Assessment Water Quality of Bodies in Ngoc Thanh Commune, Phuc Yen District, Vinh Phuc Province

  _____    __   __   _    _     ______   _    _   
 / ____||  \ \\/ // | || | ||  /_   _// | \  / || 
/ //---`'   \ ` //  | || | ||   -| ||-  |  \/  || 
\ \\___      | ||   | \\_/ ||   _| ||_  | .  . || 
 \_____||    |_||    \____//   /_____// |_|\/|_|| 
  `----`     `-`'     `---`    `-----`  `-`  `-`