00270nam a2200097Ia 4500008004100000100002100041245004600062260003900108300000700147650001800154191201s2014    xx            000 0 und d  aHELFAND, Lewis   0aThey Changed the World Edison Tesla Bell   bKALYANI NAVYOG MEDIA PVT LTDc2014  a98  aGeneral Books