यो Publication Issue आफ्नो भाषा मा अवस्थित छैन, हेर्नुहोस्: Português (pt), Español (es), Français (fr), English (en),
अथवा गुगल अनुवाद प्रयोग:  

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.