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	1.	The incidence of influenza among persons of different economic status during the epidemic of 1918. 1931. [electronic resource] by Sydenstricker, Edgar Producer: 20060421 In: Public health reports (Washington, D.C. : 1974) vol. 121 Suppl 1 Availability: No items available. Save to lists Add to cart (remove)
	2.	Health insurance, the medical profession, and the public health. 1919. [electronic resource] by Warren, B S Sydenstricker, Edgar Producer: 20060421 In: Public health reports (Washington, D.C. : 1974) vol. 121 Suppl 1 Availability: No items available. Save to lists Add to cart (remove)

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