00431nam a2200145Ia 4500003000900000008004100009020001800050040001600068080001800084110002900102245008300131260003600214300000900250650002600259IN-BaIIA211028s9999    xx            000 0 eng d  a0-586-08095-3  cIIA Library  a03:621bHAP-1  aHaper-Collins Publishers 0aHow things work, the Universal encyclopedia of machinesbvol. 1cHaper-Collins  aNew DelhibHarper Collinsc1998  a590p  aMachines encyclopedia