|May-1927||Preliminary Report of the Director of the School of Tropical Medicine 1926-27||-|
|May-1927||The Advancement of Epidemiology through Experiment II||Flexner, Simon|
|May-1927||Vitamin Studies in Porto Rico||Cook, Donald H.|
|May-1927||Review of Reviews||Rodríguez Pastor, José|
|May-1927||Studies of the Malaria Problem in Porto Rico Paper XI||-|
|May-1927||Report of the Division of Roentgenology of the Department of Health||-|
|May-1927||Brief News Notes||Department of Health of Porto Rico; Department of Health of Porto Rico|
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