NOTES ON THE MICROSTRUCTURE OF SOME COALS FROM NORTH CHINA
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Abstract:
In attempting to gain some notion as to the constitution of different types of coal of North China and their correlation, I have adopted at this initial stage two methods: One is the process of microscopic examination by
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Y. AKASEGAWA.1926. NOTES ON THE MICROSTRUCTURE OF SOME COALS FROM NORTH CHINA[J]. Acta Geologica Sinica,(2):