00451nam a22001458a 4500001001400000003000400014008004100018020001500059050001700074100002800091245009600119260005400215300001700269650001900286vtls000000258MTX960804c1993    enka     b    001 0 eng d  a058230156400aGB401.5bS821 aSummerfield, Michael A.10aGlobal Geomorphology : An introduction to the study of landforms /cMichael, A. Summerfield  aNew York :bLongman Scientific & Technical,c1993  a537 p :bill 4aGeomorphology.