共 50 条
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- [27] Preparation of mineral was from bituminous brown coals Khimiya Tverdogo Topliva, 1995, (03): : 43 - 50
- [29] FLUORINE CONTENT OF BROWN COALS FROM GDR ZEITSCHRIFT FUR ANGEWANDTE GEOLOGIE, 1973, 19 (09): : 447 - 449