title: Nutrition classics. The American Journal of Hygiene, volume I, 1921: Studies on experimental rickets. VII. The relative effectiveness of cod liver oil as contrasted with butter fat for protecting the body against insufficient calcium in the presence of normal phosphorus supply. By P.G. Shipley, E.A. Park, E.V. McCollum and Nina Simmonds.
mesh_terms: D000818:Animals; D002079:Butter; D002118:Calcium / Q000172:deficiency; D003060:Cod Liver Oil / Q000266:history* / Q000627:therapeutic use; D005395:Fish Oils / Q000266:history*; D049673:History, 20th Century; D012279:Rickets / Q000266:history* / Q000517:prevention & control; D014801:Vitamin A / Q000266:history*; D014807:Vitamin D / Q000266:history*
chemical_list: D005395:Fish Oils; D014801:Vitamin A; D014807:Vitamin D; D003060:Cod Liver Oil; D002079:Butter; D002118:Calcium