..............page:252-257
Research on the Change of Ninghe Wetlands and It's Ecological Environment
zhan hua-ming1; kang hui2; song xiao-jun1; shi wen-xue1; wang zhi-gang1; qin lei1; wu yu-gang3; yang man-rong4 (1.institute of geology; tianjin geological exploration bureau of north china; tianjin; 300181; 2.tianjin institute of geology and mineral resources; tianjin; 300170; china; 3.dongli branch of tianjin highway bureau; tianjin; 300300; china; 4.tianjin university of science technology; tianjin; 300457; china)
..............page:307-314
..............page:277-283
Carlin-type Told Deposits Distribution and Prospecting in China
tan shimin1; shi guodong1; 2; lei liangqi1; xiao zhun1(1.department of resources & environmental engineering; guilin university of technology; guilin 541004; china; 2.department of civil engineering; anhui institute of architecture & industry; hefei 230601; china)
..............page:289-294
..............page:241-251
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..............page:284-288