SHAPIRO, S Intramuscular administration of the anticoagulant warfarin (coumadin) sodium. [electronic resource] - Journal of the American Medical Association Nov 1957 - 1377-80 p. digital Publication Type: Journal Article ISSN: 0002-9955 Standard No.: 10.1001/jama.1957.02980290017004 doi Subjects--Topical Terms: AnticoagulantsCoumarins--analogs & derivativesSodiumSodium, DietaryWarfarin