Economic study of roadway lighting / Arno Cassel , Douglas -Medville.
Cassel, Arno.
Economic study of roadway lighting / Arno Cassel , Douglas -Medville. - Washington, D.C. : HRB - 77 p. - Report / Highway Research Board ; 20 .
Economic study of roadway lighting / Arno Cassel , Douglas -Medville. - Washington, D.C. : HRB - 77 p. - Report / Highway Research Board ; 20 .