Atwater, Mary <br/><br/>Earth Changes Through Time  -- New York:  Macmillan/McGraw-Hill School Publishing Company,  1993. <br/> col.: ill.;  25. <br/><br/> Includes index. <br/><br/><label>ISBN: </label>0022742875 <br/><br/><label>Dewey Class. No.: </label>GS Cir 500 H115 1993