Kakkuri, J. (1973). Stellar triangulation with balloon-borne beacons. Finnish Geodetic Institute.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKakkuri, Juhani. Stellar Triangulation with Balloon-borne Beacons. Helsinki: Finnish Geodetic Institute, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्रKakkuri, Juhani. Stellar Triangulation with Balloon-borne Beacons. Finnish Geodetic Institute, 1973.
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