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	1.	Measles outbreak--Monroe County. [electronic resource] by Longenecker, R E Producer: 19760305 In: Pennsylvania medicine vol. 79 Availability: No items available. Save to lists Add to cart (remove)
	2.	Vaccine pamphlet supplement released. [electronic resource] by Longenecker, R E Producer: 19921104 In: Pennsylvania medicine vol. 95 Availability: No items available. Save to lists Add to cart (remove)
	3.	Influenza surveillance in Pennsylvania. [electronic resource] by Hrehorovich, V R Schrack, W D Hall, D A Longenecker, R E Gratch, I F Producer: 19700811 In: Public health reports (Washington, D.C. : 1896) vol. 85 Availability: No items available. Save to lists Add to cart (remove)

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