00345nam a2200145Ia 450000500170000000800410001702200090005802400100006705000170007707400120009424500510010626000110015726000220016826000090019020250523171846.0250508s9999    xx            000 0 und d  a5273  qIGCTR  a01IGCTR       a1005273 0aInternational Geological Congress 27th Reports  aMoscow  bNauka Publication  c1984