นี้ Publication Issue ไม่ได้อยู่ในภาษาของคุณ, ดูใน: Português (pt), Español (es), Français (fr), English (en),
หรือใช้ Google Translate:  

From problem to productive free resource: this book explains that, although the water hyacinth has become a problem, it can be very useful.

It uses material from the Practical Action's "Technical Brief - Water Hyacinth", with kind permission.
This edition published in the United Kingdom in 2020 by MissionAssist.