Papua New Guinea University of Technology. Department of Forestry , Vatasan, G. S., & Vatasan, R. N. (1988). Proceedings: Workshop on low cost aerial photography. Papua New Guinea University of Technology.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPapua New Guinea University of Technology. Department of Forestry , G. S. Vatasan, और R. N. Vatasan. Proceedings: Workshop on Low Cost Aerial Photography. [Lae]: Papua New Guinea University of Technology, 1988.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPapua New Guinea University of Technology. Department of Forestry , et al. Proceedings: Workshop on Low Cost Aerial Photography. Papua New Guinea University of Technology, 1988.
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