PATTISON, HARRY C <br/><br/>
RAPID EXCAVATION AND TUNNELING CONFERENCE 

 - S.E. 
 - S.L. Sin Pais  S.E.  1974 
<br/><br/> CLASIFICACION: 622.26 
<br/><br/><label>LCCN: </label>22574 
<br/><br/><label>Dewey Class. No.: </label>IBM4381