TY  - RPRT
TI  - Emergency vehicle warning devices: interim review of the state-of-the-art relative to performance standards
AU  - Pierce, E T
AU  - McPherson, M A
AU  - Howett, G L
PY  - 1971
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS RPT 10478
DO  - 10.6028/NBS.RPT.10478
ER  -