Petersen, Morris S <br/><br/>
Interpreting earth history :  a manual in historical geology / 
Morris S. Petersen, J. Keith Rigby 
 - 4th ed. 
 - Dubuque, Iowa:  Wm C. Brown Company Publishers,  1990 
 - vii, 216 p. :  ill. (some col.) ;  28 cm. 
<br/><br/><label>ISBN: </label>0697050882 
<br/><br/><label>LCCN: </label>89-060315 //r91 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Historical geology