Cox, Elizabeth. <br/><br/>
Improving subsistence agriculture  a basic ingredient for development 
by E. Cox and J. W. Tyler. 
 -  1980. 
 - 12 leaves. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture--Papua New Guinea.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Papua New Guinea--Economic conditions.