Letter from Roy Alexander to Glenn T. Seaborg thanking him for information provided during a previous phone call, accompanying a model of the Alexander Arrangement of Elements
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Letter from Glenn T. Seaborg to Roy Alexander expressing interest in the Alexander Arrangement of Elements, and thanking him for the model of the AAE received
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Page one of a letter from Roy Alexander to Glenn T. Seaborg discussing information provided by Dr. Seaborg concerning the Lanthanides and Actinides (page 1)
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Page two of a letter from Roy Alexander to Glenn T. Seaborg discussing information provided by Dr. Seaborg concerning the Lanthanides and Actinides (page 2)
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Letter from Glenn T. Seaborg to Roy Alexander with approval of the connections and constructions of the Alexander Arrangement of Elements
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