Điều này Link không tồn tại trong ngôn ngữ của bạn, Xem trong: English (en),
Hoặc dùng Google Translate:  

https://www.globalwaters.org/

The Water and Development Technical Series is a set of technical briefs that provide guidance on important topics for developing and implementing water and sanitation activities in support of the U.S. Government Global Water Strategy and USAID’s plan under the strategy.