00440nam a2200169Ia 450000500170000000800410001724500580005826000390011630000180015530000110017302000220018405000170020654600120022333600090023533700150024433800110025920260803094039.0251212s2002    xx            000 0 und d1 aWhat if...? : b75 fascinating questions and answers.  aNew York :bGramercy Books,c2002.  axiii, 139 p.:  c22 cm.  a978-0-517-22984-2  a502 W55 2007  aEnglish  aText  aUnmediated  aVolume