یہ Publication Issue آپ کی زبان میں موجود نہیں ہے, میں دیکھنے: Español (es), Français (fr), English (en),
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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.