Carbonizing properties and petrographic composition of Upper Freeport coal from Morgantown District, Monongalia County, W. Va. :
and of Lower Freeport coal from eastern Indiana County, near Cambria County, Pa. /
by A.C. Fieldner, J.D. Davis, W.A. Selvig, D.A. Reynolds, R.E. Brewer, G.C. Sprunk and C.R. Holmes.

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