ebrary, Inc, Leonard, J. W., & Hardinge, B. C. (1991). Coal preparation (5th ed.). Society for Mining, Metallurgy, and Exploration.
Citace podle Chicago (17th ed.)ebrary, Inc, Joseph W. Leonard, a Byron C. Hardinge. Coal Preparation. 5th ed. Littleton, Colo.: Society for Mining, Metallurgy, and Exploration, 1991.
Citace podle MLA (9th ed.)ebrary, Inc, et al. Coal Preparation. 5th ed. Society for Mining, Metallurgy, and Exploration, 1991.
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