Tunnels & Tunnelling: the international Journal of underground works 

 - London    Polygon Media   1981 
 - Monthly 
 - Vol.13, no.7; 1981 
<br/><br/> Looks at machinery, plant and equipment issue 
<br/><br/><label>ISSN: </label>13693999 
<br/><br/><label>LC Class. No.: </label>TA800.T8