00286    a2200121   4500020001500000082001300015100001900028245002000047260004500067300001500112650002000127700001700147  a0783591241  a621bHOW  aPorter, Alison  aHow things work  aHong kongbTime warner booksc1997g1996  a64p.c31cm  aAPPLIED PHYSICS  aDavies, Eryl