Davidson, John. <br/><br/>
Three dimensional forestry in Papua New Guinea / 
John Davidson. 
 - [Lae :  Papua New Guinea University of Technology],  1976. 
 - 18 p. :  ill. 
<br/><br/> Paper prepared for the Third Meeting of the Botanical Society of Papua New Guinea, University of Technology, Lae, 1 May 1976. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Forests and forestry--Papua New Guinea.<br/>Agroforestry--Papua New Guinea.