00574nam a22002057a 450000500170000001000110001702000100002803500110003803700160004904000120006508200150007710000270009224500710011926000430019027000450023330000280027850000190030665000200032565000230034520170124110033.0  a608357  c14.00  a608357  bCen Lib/Ret  aDPLbEN  a551.7bSPE  aSpencer, Edgar Winston  aBasic concepts of historical geology /cby   Edgar Winston Spencer  aNew DelhibOxford Publishing Co.c1970  aN-88,Connaught CircusbNew Delhie110001  a499p. :c23cm(Hb)bill.  aIncludes index  aNatural Science  aHistorical Geology