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Are you R. O. Herzog, author of the books below?
Kunstseide (Technologie der Textilfasern) by E. A. Anke Der Flachs by W. Sprenger Wollkunde by Gustav Frölich Die Weltwirtschaft der Baumwolle (Technologie der Textilfasern) by Paul Koenig Technologie und Wirtschaft der Seide (Technologie der Textilf... by Hermann Ley Baumwollspinnerei by Hugo Glafey Der Flachs by W. Kind Die Spinnerei (Technologie der Textilfasern 2) by A. Lüdicke Chemische Technologie der Baumwolle / Mechanische Hilfsmittel... by R. Haller Chemische Konstitution und Physikalische Eigenschaften by Samuel Smiles


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