2018JIS H 7306:2018 Superconductivity -- Residual resistance ratio measurement -- Residual resistance ratio of Nb-Ti and Nb3Sn composite superconductors
2012JIS H 7306:2012 Superconductivity -- Residual resistance ratio measurement -- Residual resistance ratio of Nb-Ti composite superconductors
2005JIS H 7306:2005 Superconductivity --Part 4: Residual resistance ratio measurement -- Residual resistance ratio of Nb-Ti composite superconductors