Montgomery, Carla W., 1951- <br/><br/>
Earth :  then and now / 
Carla W. Montgomery, David Dathe 
 - Dubuque, Iowa :  Wm. C. Brown Publishers,  1991 
 - 620 p., 6 p. of plates :  ill. (some col.) ;  28 cm. 
<br/><br/><label>ISBN: </label>0697115194  RM181.34 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology<br/>Historical geology