Laura E. Powers <br/><br/>
Ecological Principles of Agriculture 

 - Africa  Delmar Thomson Learning  2000 
 - 433p 
<br/><br/>Laura E. Powers & Robert McSorley: Ecological Principles of Agriculture.  Africa.  Delmar Thomson Learning, 2000. 0-7668-0653-7--(630.2POW)   
<br/><br/><br/>ENGLISH 
<br/><br/><label>ISBN: </label>0-7668-0653-7 
<br/><br/><label>Dewey Class. No.: </label>630.2  / POW