Henderson James M <br/><br/>
Efficiency of the coal industry   An application of    

 -  1958 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal  Industry
<br/><br/><label>Dewey Class. No.: </label>X9(F551):B2891, J8