Jennings, William Munro. <br/><br/>
Percussion drilling rigs and tools for shallow water wells, 
by W. M. Jennings. 
 - London,  The Technical Press ltd.,  1934. 
 - xii, 91 p.  illus., diagrs.  22 cm. 
<br/><br/> Advertising matter: p. ii, vi, 87-91. 
<br/><br/>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Drilling and boring machinery.<br/>MCE<br/>Wells.
<br/><br/><label>Dewey Class. No.: </label>628.952  / JEN