00431nam a2200145Ia 4500003000900000008004100009020001800050040001600068080001800084110002900102245008300131260003600214300000900250650002600259IN-BaIIA211028s9999    xx            000 0 eng d  a0-586-08173-9  cIIA Library  a03:621bHAP-2  aHaper-Collins Publishers 0aHow things work, the Universal encyclopedia of machinesbvol. 2cHaper-Collins  aNew DelhibHarper Collinsc1998  a591p  aMachines encyclopedia