Botkin, Daniel B  . <br/><br/>
Environmental Stdies : the earth as a living planet /  
Daniel B. Botkin and Edward A. Keller. 
 - Columbus :   Charles E.Merrill Publishing ,   1982. 
 - 506p. :   ills ;   25cm .  
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label> USD 29.95 (Hb) 
<br/><br/><label>Subjects--Index Terms: </label>ENVIRONMENTAL SCIENCE 
<br/><br/><label>Dewey Class. No.: </label>372.357  / BOT/E