Davenport, Byron <br/><br/>
Horizontal & vertical drilling 

 - New York,  McGraw Hill,  1992 
 - x;  357p 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mining & related Technology<br/>Drilling
<br/><br/><label>Dewey Class. No.: </label>622.23   / D471H