June, page 9—The following caption was omitted from the photograph appearing in the letter to the editor written by F. Janouch: “Scene of central square in Prague. Photo credit: United Press International.”
July, page 47—The statement: “Copyright © The Nobel Foundation 1972” should have appeared at the end of John Bardeen's article.
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© 1973 American Institute of Physics.
1973
American Institute of Physics
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