P�alacuppirama�niya�n, Es. <br/><br/>
Digital mapping system 
by S. Balasubramanian. 
 - Lae  Dept. of Surveying, Papua New Guinea University of Technology  1982. 
 - 9 leaves  30cm. 
 - Research series  82/1. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cartography--Data processing.