Petersen, Morris S. <br/><br/>
Interpreting earth history :  a manual in historical geology / 
Morris S. Petersen, J. Keith Rigby 
 - 6th  ed. 
 - Boston :  McGraw Hill,  1999 
 - vii, 228 p. :  ill . ;  27 cm. 
<br/><br/><label>ISBN: </label>0697282902