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