Ojakangas, Richard W. <br/><br/>
The earth, past & present / 
Richard W. Ojakangas, David G. Darby 
 - New York :  McGraw-Hill,  c1976 
 - x, 260 p. :  ill., plates ;  23 cm. 
 - McGraw-Hill earth science paperback series .
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0070476764 :  USD 5.95 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology<br/>Earth
<br/><br/><label>Dewey Class. No.: </label>550