Emergency vehicle warning lights :
state of the art /
prepared by Gerald L. Howett, with Kenneth L. Kelly, and E. Thomas Pierce ; prepared for National Institute of Law Enforcement and Criminal Justice, Law Enforcement Assistance Administration, U.S. Department of Justice.

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Item Link Original Source
Full view   Technical Report Archive & Image Library
Full view   University of California
Full view   no.480:16 University of Illinois at Urbana-Champaign