Francis, F. O., <br/><br/>
Weak rock tunneling :  a simplified analytical simulation, a PC-based model and design charts for engineering practice / 
F. O. Franciss. 
 - Rotterdam :  A. A. Balkema,  1994. 
 - 200 pages :  illustrations ;  24 cm. 
<br/><br/><label>ISBN: </label>9054101458  RM200.40 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Tunneling.<br/>Rock excavation.<br/>Tunneling--Equipment and supplies.