|Apr-1928||Studies on Schistosomiasis (S. Mansoni) in Porto Rico. III Cercariae from Planorbis Guadeloupensis||Marín, Rafael Angel|
|Apr-1928||Studies on Schistosomiasis (S. Mansoni) in Porto Rico. IV Correlation of clinical and autopsy findings with case reports.||Lambert, Robert A.; Burke, Alice M.|
|Apr-1928||Tuberculosis in the Colored Race in Porto Rico||Rodríguez Pastor, José|
|Apr-1928||Report of the Division of Epidemiology, 1926-27||Department of Health of Porto Rico|
|Apr-1928||Review of Reviews||Department of Health of Porto Rico|
|Apr-1928||Brief News Notes||Department of Health of Porto Rico|
|Apr-1928||Statistical Reports||Department of Health of Porto Rico|
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