Sillitoe, Paul. <br/><br/>
Roots of the earth :  crops in the highlands of Papua New Guinea / 
Paul Sillitoe. 
 - Manchester :  Manchester University Press,  1983. 
 - xvi, 285 p. : ill.  ill. ;  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Wola (Papua New Guinea people)--Food.<br/>Ethnobotany--Papua New Guinea.<br/>Food crops--Papua New Guinea.