Collett, George. <br/><br/>
Evaluation of methodologies to monitor smallholder coffee, cocoa and copra production / 
George Collett edited by Yvonne Byron. 
 - Canberra :  Australian National University,  1991. 
 - 62 p.:  ill. ;  30 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coffee--Economic aspects.--Papua New Guinea<br/>Tree crops--Papua New Guinea.<br/>Copra--Economic aspects.--Papua New Guinea<br/>Agriculture--Papua New Guinea.<br/>Cocoa--Economic aspects.--Papua New Guinea