00821nam a2200253Ia 4500008004100000020001400041050000800055050001400063245002500077260001500102260002100117260000900138300001600147300002000163300001000183500024500193650002900438650001600467650001500483650001800498650001700516650001700533650001700550171120s9999    xx            000 0 und d  a895773538  a600  bH847 1990  aHow in the world ? /  aNew York :  bReader's Digest,  c1990  a448 pages :  billustrations ;  c28cm.  aSummary : Learn how recycling works; masterpieces are restored; the Great Pyramid was built; Mount Rushmore was carved; handwriting experts catch criminals; a rabbit is pulled from a hat. This fascinating reference includes 425 explanation.  aCuriosities and wonders.  aMedicine --  aScience --  aTechnology --  xMiscellanea.  xMiscellanea.  xMiscellanea.