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<dl><dd>"Certain papers in cooperation with U.S. Geological Survey."</dd>
<dd>Director: Frank W. DeWolf</dd>
<dd>Administrative report / F.W. DeWolf -- Mineral resources of Illinois in 1913 and 1914 / Helen J. Skewes -- Coal in Gillespie and Mount Olive quadrangles / Wallace Lee -- Pennsylvanian fire clays of Illinois / Edwin H. Lines -- Geology and economic resources of Colchester and Macomb quadrangels / Henry Hinds -- Loess in the Canton quadrangle / T.E. Savage -- Dictionary of altitudes</dd></dl><br>Subjects: Geology</div>
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Illinois State Geological Survey</div>
Internet Archive identifier