Não informado. (1972). Environmental Health Perspectives. National Institute of Environmenatl Health Sciences.
Chicago-referens (17:e uppl.)Não informado. Environmental Health Perspectives. Research Triangle Park, NC: National Institute of Environmenatl Health Sciences, 1972.
MLA-referens (8:e uppl.)Não informado. Environmental Health Perspectives. National Institute of Environmenatl Health Sciences, 1972.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.