Papua New Guinea. Department of Information and Extension Services. <br/><br/>
Pilot study :  perception of some aspects of illustrative material / 
Department of Extension Services. 
 - Port Moresby :  Dept. of Information and Extension Services,  1971. 
 - 27 p. :  25 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Perception.
<br/><br/><label>Dewey Class. No.: </label>152.14  / P218