http://pec.lib.wvu.edu/record/P167171935The Effect of vitamin A upon incidence and severity of colds among students. Journal article reprint from: <em>Journal of the American Dietetic Association</em>, v.11:no.3 (1935:Sept.). Cameron, Hazel C. (Hazel Crabill), 1890-1943.Vitamin A--Physiological effect.Cold (Disease)Vitamin A--Therapeutic use.Cold (Disease)--Prevention.14256