Ojakangas Richard W <br/><br/>
Earth: Past and present 
Ojakangas Richard W; Darby David G 
 - New York       McGraw Hill         1976 
 - x, 260p.  cm. 
 - McGraw Hall earth science paperback series .
<br/><br/><label>Standard No.: </label>44796 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology
<br/><br/><label>Dewey Class. No.: </label>H, L63