"To be used only under the direction of a physician": commercial infant feeding and medical practice, 1870-1940.
D000818:Animals; D049671:History, 18th Century; D049672:History, 19th Century; D006801:Humans; D007223:Infant; D007225:Infant Food; D007227:Infant Nutritional Physiological Phenomena; D008892:Milk; D008895:Milk, Human; D014481:United States