Ecology :  science teachers guide, grade 9, unit 7 / 
Dept. of Education, Curriculum Unit. 
 - Port Moresby :  The Dept.,  1981. 
 - 75p. :  ill. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology--Study and teaching (Secondary)--Papua New Guinea.<br/>Ecology--Outlines, syllabi, etc.