00261nam a22001097a 4500003000400000008004100004082001600045100001600061245004400077260002200121300000800143OSt231219b        |||||||| |||| 00| 0 eng d  a550.3bL23M  aLapdes,D N.  aEncyclopedia of the Geological Sciences  aMcgraw Hillc1978  a915