Soen O I <br/><br/>
Geology, petrology and ore deposits of the viseu region, northern Portugal 

 -  1958 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>46020 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Petrology<br/>Geology
<br/><br/><label>Dewey Class. No.: </label>Hu5427, J8