02h0120020 016032s2016 enka b 00000 eng d (精装): RMB.00 eng a Bedrock aquifers in the Denver Basin, Colorado S.G. Robson revised by Washington U.S. Government Printing Office 1987 73 p. ill. ; Professional Paper ISSN; . no. aCN b010001 010001 p ; rCNY.00 ; h1