00315nam a22001337a 4500020001500000082001300015100002000028245003400048250000800082260003700090300001200127654002300139700001900162  a0751355208  a000bCHA  aChalloner, Jack  aLet's experiment with science  aNil  aLondonbDorling Kindersleyc1996  a1-31 p.  aGeneral Miscellany  aWilkes, Angela