Akai K <br/><br/>
Proceeding on weak rock: soft,fractured and weathered rock 

 -  1981 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>46502 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology
<br/><br/><label>Dewey Class. No.: </label>H2p1,N81, M1.1