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A study of the comparative value of cod liver oil, viosterol, and vitamin D milks in the prevention of rickets and of certain basic factors influencing their efficacy

NutritionVitamin D MilksDietary ExposureNutritional RequirementAnimal ScienceAnimal NutritionCod Liver OilFeed AdditiveEducationNutritional ScienceComparative ValuePharmacologyExperimental Nutrition