Kakkuri, J. (1973). Stellar triangulation with balloon-borne beacons. Finnish Geodetic Institute.
Lua i Stíl Chicago (17ú heag.)Kakkuri, Juhani. Stellar Triangulation with Balloon-borne Beacons. Helsinki: Finnish Geodetic Institute, 1973.
Lua MLA (9ú heag.)Kakkuri, Juhani. Stellar Triangulation with Balloon-borne Beacons. Finnish Geodetic Institute, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.