Structure of Herrin (no. 6) Coal seam near Duquoin, by D. J. Fisher.
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TextPublication details: Urbana, Illinois [Springfield, Schnepp & Barnes, printers] 1925.Description: 34 p. illusSubject(s): LOC classification: - TN805.I3 F5
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At head of title: State of Illinois. Department of Registration and Education. Division of the State Geological Survey.
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