Chart of the Indiana coal field :to accompany the supplementary report on the coal of Indiana, by George H. Ashley /prepared by Edwin F. Lines ; in cooperation with the United States Geological Survey.
Includes three statistical tables: Table of commercial coal mines -- Summary of coal by counties -- Composition of Indiana coal.; Detached from: Supplementary report (to report of 1898) on the coal deposits of Indiana / George Hall Ashley. In Thirty-third annual report. Indianapolis: Indiana Department of Geology and Natural Resources, 1909.
Department of Geology and Natural Resources of Indiana