TY  - RPRT
TI  - Tables of x-ray mass attenuation coefficients and mass energy-absorption coefficients 1 keV to 20 MeV for elements Z = 1 to 92 and 48 additional substances of dosimetry interest 
AU  - Hubbell, J H
AU  - Seltzer, S M
PY  - 1995
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NIST IR 5632
DO  - 10.6028/NIST.IR.5632
ER  -