Chekan, G. J. <br/><br/>
Design of bulkheads for controlling water in underground mines / 
by Gregory J. Chekan. 
 - [Avondale, Md.] :  U.S. Dept. of the Interior, Bureau of Mines,  1985. 
 - ii, 36 p. :  ill. 
 - Information circular ;  9020 .
 - Information circular (United States. Bureau of Mines) ;  9020 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mine drainage.<br/>Mine water.
<br/><br/><label>LC Class. No.: </label>TN295  TN321  / .U4 no. 9020 
<br/><br/><label>Dewey Class. No.: </label>622 s  622/.5�19 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 28.27:9020