00391nam a2200169Ia 4500008004100000020001400041050001700055100001700072245002200089245002400111245002000135264001500155264001600170264000900186300000900195999001700204190415s9999    xx            000 0 und d  a059023195  bW6321dr 1997  aWick, Walter 2aA drop of water : 2ba book of science / 0cby Walter Wick.  aNew York :  bScholastic,  c1997  a40p.  c19859d19859