|Apr-1929||Epidemiology of Tuberculosis in Porto Rico||Rodríguez Pastor, José|
|Apr-1929||Filterable Virus and Rickettsia Diseases in Tropics IV||McKinley, Earl B.|
|Apr-1929||Notes on Milk Adulteration||Del Valle Sárraga, Rafael|
|Apr-1929||Review of Reviews||Department of Health of Porto Rico|
|Apr-1929||Brief News Notes||Department of Health of Porto Rico|
|Apr-1929||Statistical Reports||Department of Health of Porto Rico|
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