Keyword "UPPER SILESIAN COAL BASIN" in:
Study of chemical and physical properties of seams of the Czech Part of the Upper Silesian Basin and preparation of the atlases of micropetrographic types and chemical technological properties of the seams
Sivek,M., Jirásek,J., Čáslavský,M., volume 36, 2003 (GRR for 2002), pages 182–183
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