Montgomery, Carla W., <br/><br/>
Earth, then and now / 
Carla W. Montgomery, David Dathe. 
 - 3rd ed. 
 - Dubuque, IA :  Wm. C. Brown,  c1997. 
 - xvi, 596 p. :  ill. (some col.), col. maps ; 
<br/><br/><label>ISBN: </label>0697282813 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology.<br/>Historical geology.
<br/><br/><label>LC Class. No.: </label>QE28  / .M687 1997