EntityQ379834· pop 8· linked from 65 articlesSK-42 reference systemSign in to savegeodetic reference ellipsoidConnectionsRussianEntitySoviet UnionConceptInternational Standard Book NumberEntitydigital object identifierEntitygeodesyEntitybibcodeEntityQ22908627Entitygeodetic reference systemEntityreference ellipsoidEntityECEFEntitysemi-axisEntityFeodosy KrasovskyEntitygeographic coordinate conversionEntityPZ-90EntityCategoriesGeodesyGeographic coordinate systemsGeography of the Soviet UnionNavigationScience and technology in the Soviet UnionSurveying