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	1.	Sequences determining the pH dependence of viral entry are distinct from the host range-determining region of the murine ecotropic and amphotropic retrovirus envelope proteins. [electronic resource] by Nussbaum, O Roop, A Anderson, W F Producer: 19931221 In: Journal of virology vol. 67 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	Study of the relationship between elevated maternal serum alpha-fetoprotein and adverse pregnancy outcome. [electronic resource] by Roop, A P Boughman, J A Blitzer, M G Producer: 19911028 In: Maryland medical journal (Baltimore, Md. : 1985) vol. 40 Availability: No items available. Save to lists Add to cart (remove)

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