GOST R 8.949-2018 State system for ensuring the uniformity of measurements. Standard reference data. Niobium. The parameters of the crystal lattice. Coefficient of linear thermal expansion from 120 K to 400 K
1970GOST R 8.949-2018 State system for ensuring the uniformity of measurements. Standard reference data. Niobium. The parameters of the crystal lattice. Coefficient of linear thermal expansion from 120 K to 400 K