TROLLDALEN, Jon Martin <br/><br/>
On the Fringe,A systems approach to the evolution of the environment and agricultural production in the Gambia, West Afr / 
[by] Jon Martin Trolldalen 
 - Oslo  University Of Oslo  1991 
 - vii, 172 p. 
<br/><br/> Includes appendix 
<br/><br/><label>Dewey Class. No.: </label>630  / TRO