<div class="description">
<p>Bibliography: p. 54
</p>
<br>Subjects: Coal -- Illinois; Coal -- Testing</div>
<div class="fn value">
<dl><dd>Breckenridge, L. P. (Lester Paige), 1858-1940</dd>
<dd>Geological Survey (U.S.). Technologic Branch</dd>
<dd>Diserens, Paul</dd></dl></div>
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