KIRK, J E Vitamin studies in middle-aged and old individuals. XI. The concentration of total ascorbic acid in whole blood. [electronic resource] - Journal of gerontology Jul 1953 - 301-4 p. digital Publication Type: Journal Article ISSN: 0022-1422 Standard No.: 10.1093/geronj/8.3.301 doi Subjects--Topical Terms: Aged--physiologyAgingAscorbic Acid--bloodBloodHumansMiddle AgedVitamins