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GRAINGER, L. Coal. Nature 241, 487 (1973). https://doi.org/10.1038/241487a0
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DOI: https://doi.org/10.1038/241487a0
Nature volume 241, page 487 (1973)
GRAINGER, L. Coal. Nature 241, 487 (1973). https://doi.org/10.1038/241487a0
Issue Date:
DOI: https://doi.org/10.1038/241487a0