References
- Kershenbaum , Vs . 1995 . ‘Non-destructive methods of inspection. Specific differences in national standards of national countries’ , Vol. 3 , Moscow : Publ Nauka Tekhnika Centre .
- Kershenbaum , Vs . 1992 . ‘Non-destructive methods of inspection. Specific differences in national standards of national countries’ , Vol. 1 , Moscow : Publ Nauka Tekhnika Centre .