2022DIN EN 9208:2022-11 Aerospace series - Programme management - Expression of need - Guidance on and format for (Need) Technical Specification; German and English version EN 9208:2021
2022DIN EN 9208:2022 Aerospace series - Programme management - Expression of need - Guidance on and format for (Need) Technical Specification; German and English version EN 9208:2021
1970DIN EN 9208 E:2021-02 Aerospace series - Programme management - Expression of need - Guidance on and format for (Need) Technical Specification
1970DIN EN 9208 E:2019-08 Aerospace series - Programme management - Expression of need - Guidance on and format for (Need) Technical Specification