Helmut Greif

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Training in Plastics TechnologyWalter Michaeli, Helmut Greif et al.
Training in Plastics Technology
Walter Michaeli, Helmut Greif, Hans Kaufmann · 1995 · 178 pages
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Training in plastics technologyHelmut Greif, Franz-Josef Vosseburger
Training in plastics technology
Helmut Greif, Franz-Josef Vosseburger · 2000 · 182 pages
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