TY  - RPRT
TI  - An outline for cooperative action on the determination of x-ray mass attenuation coefficients in the wavelength range from 0.5 to 100 A (25 to 0.12 keV) 
AU  - Heinrich, Kurt F J
PY  - 1966
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS TN 284
DO  - 10.6028/NBS.TN.284
ER  -