Zeillinger, John E. <br/><br/>
Preparation characteristics of coal from Beaver and Lawrence counties, Pa 
ohn E. Zeilinger 
 - Washington  Bureau of Mines  1969 
 - ii, 23 p.  il., 1 map  26 cm 
 - RI  7324 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>coal<br/>preparation
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Lawrence [Pensilvania]
<br/><br/><label>Universal Decimal Class. No.: </label>622