TY  - RPRT
TI  - Theory and design of a waveguide below cut-off attenuator 
AU  - Freeman, J J
PY  - 1947
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CRPL 9-2
DO  - 10.6028/NBS.CRPL.9-2
ER  -