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Koch, Helmut, 1907- National Library of the Netherlands ISNI German National Library National Library of Catalonia

Koch, Helmut. NUKAT Center of Warsaw University Library

VIAF ID: 290391810 (Personal)

Permalink: https://viaf.org/viaf/290391810

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Title Sources
Manual práctico de soldadura eléctrica por arco National Library of Catalonia
Praktisches Handbuch der Lichtbogenschweissung / Dag Du Rietz, Helmut Koch. - Braunschweig, 1939. National Library of the Netherlands National Library of Catalonia NUKAT Center of Warsaw University Library

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