Spencer E W <br/><br/>
Basic concepts of physical geology 
Spencer E W 
 -  1962 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>49640 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Petrology<br/>Geology
<br/><br/><label>Dewey Class. No.: </label>H2, K26;4