. Bulletin. ANOTHER HORIZONTAL CLEAVAGE SURFACE OF COAL FROM THE VANDALIA MINE. (X 2)124 BUREAU OF MINES BULLETIN 117 PLATE XXVII. HORIZONTAL CLEAVAGE SURFACE OF COAL FROM BENTON, ILL. 125 BUREAU OF MINES BULLETIN 117 PLATE XXVIII

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou