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1167. The effect of tropical sunlight on the development of bones of children in Puerto Rico: a roentgenographic and clinical study of infants and young children with special reference to rickets and related factors

1170. A laboratory manual of medical chemistry: containing a systematic course of experiments in laboratory manipulation and chemical action, the non-metallic elements and the medicinal metals, quantitative processes applied to sanitary water analysis, medicinal organic compounds, proteids, digestion, blood, milk, urinalysis and toxicology