1973. 2018-10-22T18:48:00Z. 2021-09-22T16:49:12Z. Vsesoi︠u︡znyĭ nauchno-issledovatelʹskiĭ geologicheskiĭ institut (Soviet Union). Vsesoi︠u︡znoe aėrogeologicheskoe nauchno-proizvodstvennoe obʺedinenie "Aėrogeologii︠a︡", Ministerstva geologii SSSR. Russian. cartographic image. Public.