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People Connected to Lund University: Lars Hörmander, Arvid Carlsson, Ernst Wigforss, Gustaf Retzius, Etzel Cardeña, Johannes Rydberg 
Ueber die Spectra von Zinn, Blei, Arsen, Antimon, Wismuth. with: KAYSER & RUNGE. Beiträge zur Kenntniss des Linien-spectra. with: Johannes Robert RYDBERG (1854-1919). Beiträge zur Kenntniss der Linienspectren. by Heinrich Johannes Gustav (1853-1940) & Carl David Tolmé RUNGE (1856-1927). KAYSER,  1894-01-01
Rydberg, Johannes: An entry from Macmillan Reference USA's <i>Chemistry: Foundations and Applications</i> by Todd W. Whitcombe,  2004
Rydberg term tables by F Paschen,  1928
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