COOLEY, G Further observations on the ninhydrin-reacting hydrolytic fragment of vitamin B12. [electronic resource] - The Journal of pharmacy and pharmacology Feb 1950 - 128 p. digital Publication Type: Journal Article ISSN: 0022-3573 Standard No.: 10.1111/j.2042-7158.1950.tb12914.x doi Subjects--Topical Terms: HydrolysisNinhydrinVitamin B 12