TY  - RPRT
TI  - Laser attenuators for the production of low power beams in the visible and 1.06 mu] regions 
AU  - Danielson, B L
PY  - 1976
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS TN 677
DO  - 10.6028/NBS.TN.677
ER  -