1998, Vol. 1(1): 98-99    DOI:
System of variation of underground water resources and its applications
Gao Zhengxia, Cao Wanjin, Wu Jimin, Zhang Junchao, Wu Anqi
1. Section of Underground Water Resources, Faculty of Civil Engineering, Hohai University, China; Bureau of Water Resources of Ningxia, China
Received null  Revised null
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