Lester, D. <br/><br/>
Quarrying and rockbreaking :  the operation and maintenance of mobile processing plants / 
D. Lester. 
 - London :  Intermediate Technology,  1981. 
 - 116 p. :  ill. 
<br/><br/><label>ISBN: </label>0903031809 
<br/><br/><label>LCCN: </label>93034191 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rock excavation.<br/>Quarries and quarrying.<br/>Blasting.