Lean, Glendon A. <br/><br/>
Counting systems of Papua New Guinea :  research bibliography / 
G.A. Lean. 
 - 3rd ed. 
 - Lae :  PNG University of Technology,  1986. 
 - [iii], 61 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Numeration, Papua New Guinean--Bibliography.