00293nam a2200109Ia 450000500170000000800410001704100080005808200130006610000140007924500440009326000460013720260720174726.0260720s1969    xx            000 0 und d  aeng  a030 ROCW  aRockville  aWorld scope encyclopedia vol 21 wor-zyr  aNew YorkbRockville House Publisherc1969