Young, F. R.
Hydrographic charting in Papua New Guinea F. R. Young and K. J. Lyons. - [Lae Dept. of Surveying, Papua New Guinea University ofTechnology 1981]. - 9 leaves.
Hydrographic surveying--Papua New Guinea.
Hydrographic charting in Papua New Guinea F. R. Young and K. J. Lyons. - [Lae Dept. of Surveying, Papua New Guinea University ofTechnology 1981]. - 9 leaves.
Hydrographic surveying--Papua New Guinea.