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Index of persons
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Helm, Richard
Helm, Richard
born 12. April 1846 in Zschaitz bei Ostrau; died 1904
Country
Germany
Profession
Oberlehrer ; Pädagoge
Source:
GND
Photochemische Prozesse und deren Verwendung
Helm, Richard
Zittau : Neboisa & Böhme, 1887
