Bouchard, J. F. <br/><br/>
The impact of roads on the monetary  activities of subsistence economies in the Okapa Region of Papua New Guinea / 
by J. F. Bouchard for the Joint Programme of Studies in the Transport Process. 
 - [Port Moresby] :  University of Papua New Guinea, Dept. of Geography,  1972. 
 - xii, 120p. :  ill., maps. 
 - Occasional paper ;  no. 4. .
 - Occasional paper (University of Papua New Guinea. Dept. of Geography) ;  no. 4. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Roads--Economic aspects--Papua New Guinea--Okapa Region.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Okapa Region (Papua New Guinea)--Economic conditions.