Rendering in Pen and Ink the Classic Book on Pen and Ink Techniques for Artists, Illustrators, Architects, and Designers Arthur L. Guptill
Illustrated Pollen Terminology Heidemarie Halbritter, Silvia Ulrich, Friðgeir Grímsson, Martina Weber, Reinhard Zetter, Michael Hesse, Ralf Buchner, Matthias Svojtka, Andrea Frosch-Radivo
