Greninger, Nevin. <br/><br/>
Seasonal variation in respirable dust concentration in U.S. coal mines / 
by Nevin Greninger, Welby Courtney, and Edward Divers. 
 - Pittsburgh, Pa. :  U.S. Dept. of the Interior, Bureau of Mines,  1986. 
 - 7 p. :  ill. ;  28 cm. 
 - Report of investigations ;  9014 .
 - Report of investigations (United States. Bureau of Mines ;  9014. .
<br/><br/>Bibliography: p. 7. 
<br/><br/><label>LCCN: </label>86600001  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mine dusts.<br/>Coal mines and mining--Dust control--United States.<br/>Seasons.
<br/><br/><label>LC Class. No.: </label>TN23  TN312  / .U43 no. 9014 
<br/><br/><label>Dewey Class. No.: </label>622 s  622/.8 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 28.23:9014