00359nam a2200145Ia 450000500170000000800410001702200090005802400110006705000170007807400120009524500640010726000110017126000220018226000090020420250523171846.0250508s9999    xx            000 0 und d  a5271  qIGCTTA  a01IGCTTA      a1005271 0aInternational Geological Congress 27th Technical Abstracts.  aMoscow  bNauka publication  c1984