| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Sustainable Groundwater Resources in Africa: Water supply and sanitation environment | 978-O-415-876O3-2 (O-415-876O3-6) | 2009 | Eberhard Braune |
Y. Xu · Yangsheng Xu · Yingcun Xia · Yingyuan Xiao · Yongguang Xie · Yongsheng Xu · Yuanchong Xu · Yuanqing Xia · Yungeng Xie