Maurer, William C. <br/><br/>
Novel drilling techniques. 

 - Oxford :  Pergamon Press,  1969. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Minería
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Libro
<br/><br/><label>Universal Decimal Class. No.: </label>622.23