Hrodek, L. <br/><br/>
Quarry operations 

 - Dar es Salaam  Univerity of Dar es Salaam  1984 
 - viii,70p.  24cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Quarries and quarrying
<br/><br/><label>LC Class. No.: </label>EAF TN277.T3H7