Safety in wells and boreholes 
Institution of Civil Engineers 
 - Revised ed 
 - London  Institution of Civil Engineers  1972 
 - 23 p.  form  21cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Wells<br/>Water-supply engineering--Safety measures
<br/><br/><label>Dewey Class. No.: </label>628.1  / 1