Costs and benefits arising if all motorcyclists wore safety helmets

Dades bibliogràfiques
Autor principal:	Allsop, R. E.
Autor corporatiu:	Road Research Laboratory
Format:	Llibre
Idioma:	English
Publicat:	Crowthorne Road Research Laboratory 1967.
Matèries:	Motorcycling > Safety measures. Safety hats.