Howett, Gerald Leonard,  d. 1931- <br/><br/>
Some psychophysical tests of the conspicuities of emergency vehicle warning lights / 
by Gerald L. Howett and the Law Enforcement Standards Laboratory, Center for Consumer Product Technology, National Bureau of Standards ; prepared for National Institute of Law Enforcement and Criminal Justice, Law Enforcement Assistance Administration 
 - Washington :  United States Government Printing Office,  1979 
 - iv, 20 p. :  ill. ;  27 cm. 
 - Special publication - National Bureau of Standards ;  480-36 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Emergency vehicles--Lighting
<br/><br/><label>Dewey Class. No.: </label>629.2293