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  1. 1
    Fusibility of coal ash and determination of softening temperature

    Fusibility of coal ash and determination of softening temperature

    Published 1918
    Government Document Microfilm Book
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  2. 2
    Fusibility of ash from coals of U.S

    Fusibility of ash from coals of U.S

    Published 1922
    Microfilm Book
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  3. 3
    Use of hydrogen-volatile-matter ratio in obtaining net heating value of American coals

    Use of hydrogen-volatile-matter ratio in obtaining net heating value of American coals

    Published 1918
    Government Document Microfilm Book
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