TY  - BOOK
ED  - Survey Congress (18th : 1983 : Lae, Papua New Guinea).
ED  - Association of Surveyors of Papua New Guinea.
TI  - The challenge of change : 18th Survey Congress, Lae, 1983
PY  - 1983///
CY  - [Lae]
PB  - Association of Surveyors of Papua New Guinea
KW  - Surveying
KW  - Papua New Guinea
ER  -