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cover of Killer Germs : Microbes and Diseases That Theaten Humanity (REV 03)

by Barry E. Zimmerman ...


ISBN13: 978-0071409261
ISBN10: 0071409262

cover of Deadly Companions: How Microbes Shaped Our History (09)

by Dorothy H. Crawford


ISBN13: 978-0199561445
ISBN10: 0199561443