00443nam a22001337a 4500020001800000082001800018100002000036245006700056260005800123300004300181500004500224650001900269700002100288  a0-675-02671-7  a550 H587 19891 aHesser, Dole T.1 aFocus on earth science /cDale T. Hesser [and] Susan S. Leach.  aColumbus, Ohio :bMerrill Publishing Company,cc1989.  ax, 614 p. :bfigs. and tables ; 26 cm.  aIncludes appendices, glossary and index.14aEarth science.1 aLeach, Susan S.