Transactions of the fourth International Sanitary Conference of the American Republics / held in San José, Costa Rica, December 25, 1909, to January 3, 1910. Published and distributed under the auspices of the Pan American Union, John Barrett, director-general.

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Transactions of the fourth International Sanitary Conference of the American Republics / held in San José, Costa Rica, December 25, 1909, to January 3, 1910. Published and distributed under the auspices of the Pan American Union, John Barrett, director-general. Public Domain Mark. Source: Wellcome Collection.

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This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.