TY  - RPRT
TI  - Absorbed-dose calibration of ionization chambers in a ⁶⁰Co gamma-ray beam 
AU  - Pruitt, John S
PY  - 1990
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NIST SP 250-40
DO  - 10.6028/NIST.SP.250-40
ER  -