The dynamic earth system/ 
Patwardhan,A.M. 
 - 2nd ed. 
 - New Delhi:  PHI Learning Private Limited,  2010. 
 - 422 p. 
<br/><br/><label>ISBN: </label>9788120340527 
<br/><br/><label>Dewey Class. No.: </label>550  / PAT/D