Survey Congress (12th : 1977 : Port Moresby, Papua New Guinea), & Association of Surveyors of Papua New Guinea. (1977). "Technological obsolescence, can Papua New Guinea afford it?": [papers presented at the] Twelfth Survey Congress, Port Moresby, 8th-12th August, 1977. Association of Surveyors of Papua New Guinea.
Chicago Style (17th ed.) CitationSurvey Congress (12th : 1977 : Port Moresby, Papua New Guinea), and Association of Surveyors of Papua New Guinea. "Technological Obsolescence, Can Papua New Guinea Afford It?": [papers Presented at the] Twelfth Survey Congress, Port Moresby, 8th-12th August, 1977. [Papua New Guinea]: Association of Surveyors of Papua New Guinea, 1977.
MLA (9th ed.) CitationSurvey Congress (12th : 1977 : Port Moresby, Papua New Guinea), and Association of Surveyors of Papua New Guinea. "Technological Obsolescence, Can Papua New Guinea Afford It?": [papers Presented at the] Twelfth Survey Congress, Port Moresby, 8th-12th August, 1977. Association of Surveyors of Papua New Guinea, 1977.