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Are you R.O. Herzog, author of the books below?
Die Wollspinnerei by O. Bernhardt Künstliche Organische Farbstoffe by Hans Eduard B. Fierz-David Der Flachs by W. Sprenger Physik und Chemie der Cellulose (Technologie der Textilfasern) by H. Mark Handbuch der Bodenlehre by Edwin Blanck Die Weltwirtschaft der Baumwolle (Technologie der Textilfaser... by Paul Koenig Die Wollspinnerei by G. Fritsch Wollkunde by Gustav Frölich Baumwollspinnerei by E. Brücher Die Jute by E. Nonnenmacher


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