DS/ISO/TS 11665-12:2021 Measurement of radioactivity in the environment – Air: radon-222 – Part 12: Determination of the diffusion coefficient in waterproof materials: membrane one-side activity concentration measurement method
2021DS/ISO/TS 11665-12:2021 Measurement of radioactivity in the environment – Air: radon-222 – Part 12: Determination of the diffusion coefficient in waterproof materials: membrane one-side activity concentration measurement method