Author: Jeffrey, E.C., 1924.:
Title: The origin and organization of coal.
Description: [Mem. Amer. Acad. Arts & Sci., 15(1).] Lancaster, Pa. 4to. Pp. 52, 62 photos and figs. of thin sections (14 in colour) on 13 pls. 4to. New wrs., orig. printed front cover mounted. - The author made several contributions to the techniques of making thin sections of coal, and the present memoir is, according to Andrews, "an especially informative account".

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