00367nam a2200133Ia 4500008004100000082001500041100002100056245001300077260003800090300001000128490002500138600005600163650001400219140224s9999    xx            000 0 und d  aR 621-8 L2  aO' Brien Robert.  aMachines  aNew YorkbTime-Life Bookscc 1972  a200p.  aLife Science Library  a Robert O' Brien and the editors of time-life books  aMachinery