Seeking stability in a volatile environment :  technical papers of the 20th Congress of the Association of Surveyors of Papua New Guinea held in Rabaul from the 1st July to the 5th July, 1985 / 
edited and produced by B.J. Walsh. 
 - Lae :  PNG University of Technology, Dept. of Surveying  1985. 
 - 233 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Surveying--Papua New Guinea.