Wojtkowski Paul A. <br/><br/>
Agroecological perspectives in agronomy ,forestry ,and agroforestry  

 - USA  Science Publishers   2002 
<br/><br/><label>ISBN: </label>1-57808-217-x 
<br/><br/><label>LC Class. No.: </label>634.9/WOJ  / 2 
<br/><br/><label>Dewey Class. No.: </label>634.9/WOJ  / 2