Visibility 11 reports.

Sonraí bibleagrafaíochta
Údair chorparáideacha:	National Research Council (U.S.). Highway Research Board, National Research Council (U.S.). Highway Research Board. Meeting, National Research Council (U.S.). Committee on Visibility
Formáid:	LEABHAR
Teanga:	English
Foilsithe / Cruthaithe:	Washington, D.C. Highway Research Board 1972.
Sraith:	Highway research record no. 378.
Ábhair:	Automobile driving at night > Congresses. Night vision > Congresses. Motor vehicles > Lighting > Congresses. Roads > Lighting > Congresses.