TY  - RPRT
TI  - Calibration of x-ray and gamma-ray measuring instruments 
AU  - Lamperti, Paul J
AU  - O'Brien, Michelle
PY  - 2001
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NIST SP 250-58
DO  - 10.6028/NIST.SP.250-58
ER  -