KROC, R L Biologic activity of pork and beef thyroid preparations. [electronic resource] - The Journal of clinical endocrinology and metabolism Dec 1956 - 1595-606 p. digital Publication Type: Journal Article ISSN: 0021-972X Standard No.: 10.1210/jcem-16-12-1595 doi Subjects--Topical Terms: AnimalsBiological ProductsCattleHumansMeatSwineThyroid (USP)Thyroid Gland