|Dec-1928||Hookworm Disease and Hook worm Infestation in Porto Rico||Howard, H.|
|Dec-1928||An Experiment in Supplementing the Diet of School Children||Payne, George C.; Rivera, Martínez|
|Dec-1928||A preliminary study of a Common Porto Rican Diet||Cook, Donald H.; Rivera, Trinita; Torres Díaz, Luis|
|Dec-1928||Annual Report of the Dispensaries of Child Welfare Maternity and Tuberculosis 1927-28||Department of Health of Porto Rico|
|Dec-1928||Review of Reviews||Department of Health of Porto Rico|
|Dec-1928||Brief News Notes||Department of Health of Porto Rico|
|Dec-1928||Statistical Reports||Department of Health of Porto Rico|
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