Halvorsen R Ed. <br/><br/>
Explorations in Environmental & Natural Resource E 

 - Cheltenham  Edward Elgan publishings          2006 
 - 260p  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X.271:(G:SS), P6