TY  - JOUR
AU  - O'Brien, C
AU  - Kessler, C.
AU  - Burns, D
C2  - Metrologia
DA  - 2011-08-01
LA  - en
M1  - 0612
PB  - Metrologia
PY  - 2011
TI  - Key comparison BIPM.RI(I)-K7 of the air-kerma standards of the NIST, USA and the BIPM in mammography x-rays.
ER  -