00289nam a2200121Ia 450000500170000000800410001704100080005808200150006610000230008124500280010426000260013230000090015820260720174634.0260720s2006    xx            000 0 und d  aeng  a540.2 SCOI  aScott, H A William  aInstant facts chemistry  aLondonbCollinsc2006  a180p