Safety vi wells and boreholes/ 

 - Institution of Civil Engineers 
 - London   Designer & Printers   1972 
 - 23p   Pbk 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Wells <br/>Borehole  runing
<br/><br/><label>LC Class. No.: </label>TD41`2.I5  1972