1 Solovev S.V.
2 Spiridonov A.I.
Year: 
№: 
713
Pages: 
9-13
Citation:
Solovev S.V., 
Spiridonov A.I., 
(1999) Sertification Tests of NIK-3 Level. Geodesy and cartography = Geodeziya i Kartografiya, 60(12), pp. 9-13. (In Russian).