TY  - RPRT
TI  - Precision measurement and calibration : selected NBS papers on frequency and time
AU  - Blair, B E
AU  - Morgan, A H
PY  - 1972
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS SP 300v5
DO  - 10.6028/NBS.SP.300v5
ER  -