00339nam a2200121Ia 450000500170000000800410001704100080005808200120006610000340007824500530011226000430016530000090020820260720174711.0260720s1947    xx            000 0 und d  aeng  a030 WBE  aRobert O Zeleny William Nault  aWorld book encyclopedia 50th anniversary edition  aChicago,LondonbField Enterprisec1947  a980p