The price of coal varies by coal rank and grade, mining method, and geographic region. Coal is classified into four main ranks (lignite, subbituminous, bituminous
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Detailed online information and presentations about the National Energy Code for Buildings (NECB).
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This list shows the abbreviations used for journal titles as cited works. Copy the abbreviated (boldface) title from this list and paste it in the Cited
Cross Validated is a question and answer site for people interested in statistics, machine learning, data analysis, data mining, and data visualization.