TY  - RPRT
TI  - The comparative accuracy of various existing and proposed radio navigation systems 
AU  - Crichlow, W Q
PY  - 1946
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CRPL 4-1
DO  - 10.6028/NBS.CRPL.4-1
ER  -