No Clear Evidence From Countries That Have Enforced The Wearing Of Helmets

Autor:	Robinson, D. L.
Zdroj:	BMJ: British Medical Journal, 2006 Mar . 332(7543), 722-725.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/25456477 Zobrazit plný text záznamu