Audible warning signals for police vehicles
Appl.Ergonomics ; 11 , 3
1980
6 pages
Appl.Ergonomics;11(1980)3;165-170
Article (Journal)
English
Audible and visual alert warning system for approaching vehicles
European Patent Office | 2017
|AUDIBLE AND VISUAL ALERT WARNING SYSTEM FOR APPROACHING VEHICLES
European Patent Office | 2017
|