00317nam a22001097a 4500008004100000020001500041082000800056245004900064260004800113300002600161500002000187101201t        xxu||||| |||| 00| 0 eng d  a0521239001  a550  aThe Cambridge Encyclopedia of Earth Sciences  aLondon:bCambridge University Press,c1981.  a496p.bill. some col.  aincludes index.