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PDF) Siderite microconcretions of the Saddle coal seam No. 559 in the Lazy Mine (Karviná Formation, Czech part of the Upper Silesian Basin) - Sideritové mikrokonkrece ze sedlové sloje č. 559 v
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PDF) Occurrence of goniatite Neoglyphioceras spirale (Phillips, 1841) from the Bohučovice quarry and its significance for stratigraphy of the Nízký Jeseník Mts. Culm sediments (Czech Republic)
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