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| 1942 || || E.F Burton and W.Kohl publish ''The Electron Microscope''.<ref name="The Growth of Electron Microscopy">{{cite book |title=The Growth of Electron Microscopy |url=https://books.google.com.ar/books?id=o-IFp53_1-IC&pg=PA373&dq=1938+James+Hillier+builds+another+TEM&hl=en&sa=X&ved=0ahUKEwi4zZnMgZHgAhWoHLkGHdfgDZgQ6AEIKzAA#v=onepage&q=1938%20James%20Hillier%20builds%20another%20TEM&f=false}}</ref> ||
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| 1942 || Organization || The {{w|Microscopy Society of America}} is founded. <ref>{{cite web |title=A Brief History of the Microscopy Society of America |url=https://www.microscopy.org/about/history.cfm |website=microscopy.org |accessdate=30 January 2019}}</ref> || {{w|United States}}
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| 1944 || || {{w|Electron microscope}}s with theoretical resolutions reduced to 2 nm are introduced.<ref name="Overview of Electron Microscopy"/> ||
