TY  - RPRT
TI  - The Development and testing of a highly directional dual-mode electronic siren 
AU  - Fisher, R L
AU  - Toth, D D
AU  - Blomquist, D S
AU  - Forrer, J S
PY  - 1978
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS SP 480-28
DO  - 10.6028/NBS.SP.480-28
ER  -