Houseknecht, David W. <br/><br/>
Probability of encountering coalbed discontinuities during vertical and horizontal borehole drilling / 
by David W. Houseknecht. 
 - [Avondale, Md.] :  U.S. Dept. of the Interior, Bureau of Mines,  [1982] 
 - ii, 21 p. :  ill. ;  28 cm. 
 - Report of investigations ;  8665 .
 - Report of investigations (United States. Bureau of Mines) ;  8665. .
<br/><br/>Bibliography: p. 20-21. 
<br/><br/><label>LCCN: </label>82600056  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Boring.<br/>Methane.<br/>Coal mines and mining.
<br/><br/><label>LC Class. No.: </label>TN23  TN305  / .U43 no. 8665 
<br/><br/><label>Dewey Class. No.: </label>622 s  622/.8 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 28.23:8665