U.S. Coal and the Electric Power Industr
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C.I.K. Forster
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Article
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1976
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Elsevier Science
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English
β 163 KB
## Book Reviews graphs are of good quality although by compressing too many on to a page some do not adequately portray the features they are supposed to illustrate. As an example, the photographs of duroclarite and clarodurite in Figure 50, c andd, do not clearly show the maceral proportions whic