 |
| English | German |
| international radium standard | internationaler Radiumstandard |
| international reference system | Internationales Referenzsystem (of the International Bureau of Weights and Measures for activity measurement of γ-emitting nuclides) |
|
| English | German |
| international radium standard | internationaler Radiumstandard |
| international reference system | Internationales Referenzsystem (of the International Bureau of Weights and Measures for activity measurement of γ-emitting nuclides) |