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

Water shortages are a problem in arid and semi-arid lands and this book introduces sand dams as a way of maintaining water supplies in times of drought.

This uses material from "Practical Action" with kind permission.

This edition published in the United Kingdom in 2020 by MissionAssist.