Combo, John Xavier,  1922- <br/><br/>
Coal resources of Montana, 
by John X. Combo [and others] 
 - Washington,  1949. 
 - 28 p. :  illus. ;  27 cm. 
<br/><br/> Cover title. 
<br/><br/>"Selected bibliography": p. 24-26. 
<br/><br/><label>LCCN: </label>gs 50000137  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal--Montana.<br/>Coal mines and mining--Montana.
<br/><br/><label>LC Class. No.: </label>QE75  / .C5 no. 53