New York Association for Improving the Condition of the Poor. Bureau of Public Health and Hygiene & Armstrong, D. B. (1913). Flies and diarrheal disease.
Dyfyniad Arddull ChicagoNew York Association for Improving the Condition of the Poor. Bureau of Public Health and Hygiene and Donald B. Armstrong. Flies and Diarrheal Disease. New York : New York Association for Improving the Condition of the Poor, 1913.
Dyfyniad MLANew York Association for Improving the Condition of the Poor. Bureau of Public Health and Hygiene and Donald B. Armstrong. Flies and Diarrheal Disease. 1913.
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