(2002). Iron and steel quality standards 4: Mechanical engineering and toolmaking (3rd ed.). Berlin: Beuth Verlag GmbH.
Παραπομπή Chicago StyleIron and Steel Quality Standards 4: Mechanical Engineering and Toolmaking. 3rd ed. Berlin: Beuth Verlag GmbH, 2002.
Παραπομπή MLAIron and Steel Quality Standards 4: Mechanical Engineering and Toolmaking. 3rd ed. Berlin: Beuth Verlag GmbH, 2002.
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