TY  - RPRT
TI  - A Calibration service for 30 MHz attenuation and phase shift 
AU  - Adair, Robert T
AU  - Russell, David H
PY  - 1988
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS SP 250-32
DO  - 10.6028/NBS.SP.250-32
ER  -