Secondary school mathematics 9A :  teachers' guide / 
PNG. Department of Education. 
 - Port Moresby :  Department of Education,  1987. 
 - 163 p. 
<br/><br/><label>ISBN: </label>9980581476 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Study and teaching (Secondary )--Papua New Guinea.