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- [1] Key comparison BIPM.RI(I)-K2 of the air-kerma standards of the PTB, Germany and the BIPM in low-energy x-rays [J]. 1600, IOP Publishing Ltd (51):
- [10] Key comparison BIPM.RI(I)-K2 of the air-kerma standards of the VSL, Netherlands and the BIPM in low-energy x-rays [J]. 1600, IOP Publishing Ltd (51):