Abstract
I HESITATED to answer the letter published in NATURE of June 1 from Prof. Bone because so long ago as the year 1918 he indicated to me with emphasis that he did not desire any co-operation between chemical and palæobotanical work on coal.
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STOPES, M. The Classification of Coals. Nature 136, 33 (1935). https://doi.org/10.1038/136033a0
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DOI: https://doi.org/10.1038/136033a0
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